PLEASE HELP! WHAT'S X??? URGENT!

Answer:

$445.32

Step-by-step explanation:

see picture attached

i hope this helped !!

Answer:  13

Step-by-step explanation:  1st - Distribute the -1 through to the x + -1*(5+x) first:  8 + -1*[x + -1*(5+x)] = 8 + [-1*x  +  -1*-1*(5+x)]

= 8 + [-x + -1*-1 *(5+x)]

Multiply the two -1s that are in front of the (5+x).  Negative x Negative = positive

Minus the paranthesis

Do PEDMAS

8 + [-x + 5 + x]  <- -x +x = 0

                = 8 + [0 + 5]  <- 0 and 5 are like terms and will be combined

                = 8 + 5 = 13

The answers are:

[tex]FirstCarSpeed=41mph\\SecondCarSpeed=55mph[/tex]

To calculate the speed of the cars, we need to write two equations, one for each car, in order to create a relation between the two speeds and be able to calculate one in function of the other.

So,

Tet be the first car speed "x" and the second car speed "y", writing the equations we have:

For the first car:

[tex]x_{FirstCar}=x_o+v*t[/tex]

For the second car:

We know that the speed of the second car is the speed of the first car plus 14 mph, so:

[tex]x_{SecondCar}=x_o+(v+14mph)*t[/tex]

Now, from the statement that both cars met after 2 hours and 45 minutes, and the distance between to cover (between A and B) is 264 miles,  so, we can calculate the relative speed between them:

If the cars are moving towards each other the relative speed will be:

[tex]RelativeSpeed=FirstCarSpeed-(-SecondCarspeed)\\\\RelativeSpeed=x-(-x-14mph)=2x+14mph[/tex]

Then, since we know that they covered a combined distance equal to 264 miles in 2 hours + 45 minutes, we have:

[tex]2hours+45minutes=120minutes+45minutes=165minutes\\\\\frac{165minutes*1hour}{60minutes}=2.75hours[/tex]

Writing the equation:

[tex]264miles=(2x+14mph)*t\\\\264miles=(2x+14mph)*2.75hours\\\\2x+14mph=\frac{264miles}{2.75hours}\\\\2x=96mph-14mph\\\\x=\frac{82mph}{2}=41mph[/tex]

So, the speed of the first car is equal to 41 mph.

Now, for the second car we have that:

[tex]SecondCarSpeed=FirstCarSpeed+14mph\\\\SecondCarSpeed=41mph+14mph=55mph[/tex]

We have that the speed of the second car is equal to 55 mph.

Hence, the answers are:

[tex]FirstCarSpeed=41mph\\SecondCarSpeed=55mph[/tex]

Have a nice day!

Answer:

[tex]LA=755\ m^{2}[/tex], [tex]SA=785\ m^{2}[/tex]

Step-by-step explanation:

Part 1) Find the lateral area of the given prism

we know that

The lateral area of the prism is equal to

[tex]LA=PL[/tex]

where

P is the perimeter of the triangular base

L is the length of the prism

Find the perimeter P

[tex]P=5+6+11.21=22.21\ m[/tex]

we have    

[tex]L=34\ m[/tex]

substitute

[tex]LA=(22.21)(34)=755\ m^{2}[/tex]

Part 2) Find the surface area of the given prism

we know that

The surface area of the prism is equal to

[tex]SA=2B+LA[/tex]

where

B is the area of the triangular base

LA is the lateral area of the prism

Find the area B

[tex]B=(1/2)(5)(6)=15\ m^{2}[/tex]

we have

[tex]LA=755\ m^{2}[/tex]

substitute

[tex]SA=(2)(15)+755=785\ m^{2}[/tex]

Answer:

choice A is correct

Step-by-step explanation:

For a fair coin, the theoretical probability of obtaining heads or tails is 50%

Increasing the number of trials has the effect of making the experimental probability and theoretical probability equal

Answer:

It's the first option.

Step-by-step explanation:

Assuming it is a fair coin you would expect the experimental probability to get closer to 50%.  

50% is the theoretical probability  for a fair coin because there are 2 equally possible outcomes ,heads or tails.

There is 336 ways the runners can finish first, second, and third.

You may consider a function with domain [tex](0,\infty)[/tex] and switch [tex]x\mapsto -x[/tex]

For example, we know that

[tex]y=\log(x)[/tex]

can only be evaluated for positive values of the argument. This means that

[tex]y=\log(-x)[/tex]

can also be evaluated only for positive values of the argument, i.e.

[tex]-x>0 \iff x<0 \iff x \in (0,\infty)[/tex]

To give another example, you may consider a function with domain [tex][0,\infty)[/tex], consider its inverse to remove 0 from the domain, and finally switch again [tex]x\mapsto -x[/tex]:

[tex]\sqrt{x} \implies D = [0,\infty)\\\dfrac{1}{\sqrt{x}} \implies D = (0,\infty)\\ \dfrac{1}{\sqrt{-x}} \implies D = (-\infty,0)[/tex]

Use the slope-intercept form y = mx + b to find the slope m and y intercept 'b'

Y - Intercept: 5

(Slope:) -3/4

To find the y intercept you must make x zero and solve for y:

3(0) + 4y = 20

0 + 4y = 20

4y/4 = 20/4

y = 5

This means that the y intercept is:

(0, 5)

Hope this helped!

Answer:

42 1/2>42.500

Step-by-step explanation:

the answer would be D

The number of ways to choose 2 pairs of jeans from 5 is calculated using combinations, resulting in 10 different ways, corresponding to option A.

To determine the number of ways to choose 2 pairs of jeans from 5, we need to use the combination formula, which is defined as C(n, k) = n! / (k! * (n-k)!), where 'n' is the total number of items to choose from, 'k' is the number of items to choose, and '!' denotes factorial.

In this case, n = 5 and k = 2. Therefore, the calculation becomes:

C(5, 2) = 5! / (2! * (5 - 2)!)
= (5 * 4 * 3 * 2 * 1) / ((2 * 1) * (3 * 2 * 1))
= (5 * 4) / (2 * 1)
= 20 / 2
= 10 ways.

So, there are 10 ways to choose 2 pairs of jeans from 5 pairs, which corresponds to option A.

His sister is 8 and he is 20.

let's say z represents liz. we can make an equation where z+12=4z.

Solve for that and z is equal to 4. Now that was 4 years ago. She should be 8 now?

I hope this is correct because my brain isn't doing so well today.

Answer:

Adam is 20 years old and Liz is 8 years old.

Step-by-step explanation:

Let present age of Adam = x years

Let present age of Liz = y years

Now we will make the equations.

x = y + 12 -------------(1)

For second equation

( x-4) = (y-4) × 4

x-4 = 4y - 16

x = 4y + 4 - 16

x = 4y - 12 -----------------(2)

By substitution method, we  substitute  the value of  x  from equations (1) to equation (2).

y + 12 = 4y - 12

y - 4y + 12 = -12

-3y = -12 -12

3y = 24

y = 8

Now we put the value of y in equation (1)

x = 8 + 12 = 20

Therefore, Adam is 20 years old and Liz is 8 years old.

The expression (5y+4)*(-2y+6) simplifies to -10y² + 22y + 24 when multiplied out using the distribution method. Note, it's very important to use the correct syntax when writing mathematical expressions, clarity helps avoid mistakes.

Your question appears to be asking for the result of multiplying two polynomial expressions. However, your question contains a syntax error. It should properly be written as '(5y+4)*(-2y+6)'.

To find the result, you can use the distribution method also known as the FOIL method(First, Outer, Inner, Last). Let's walk through this step by step.

First: Multiply the first terms in each binomial: 5y*-2y=-10y²

Outer: Multiply the outer terms: 5y*6=30y

Inner: Multiply the inner terms: 4*-2y=-8y

Last: Multiply the last terms: 4*6=24

So we have -10y² + 30y - 8y + 24. Combine like terms to get the final answer: -10y² + 22y + 24.

https://brainly.com/question/20121808

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B is your answer hope it helps

Step-by-step explanation:

[tex] \sqrt{x + 10} - 1 = x \\ \sqrt{x + 10} = x + 1 \\ (x + 10) = (x + 1) {}^{2} \\x + 10 = {x}^{2} + 2x + 1[/tex]

You are right, it is in fact 8(15-m)

:D

Answer:

8(15 - m)

Step-by-step explanation:

Answer:

[tex]64.3=\frac{1}{3}(B)(7)[/tex]

Step-by-step explanation:

we know that

The volume of a cone (bird feeder) is equal to

[tex]V=\frac{1}{3}Bh[/tex]

where

B is the area of the base

h is the height of the cone

In this problem we have

[tex]V=64.3\ cm^{3}[/tex]

[tex]h=7\ cm[/tex]

substitute

[tex]64.3=\frac{1}{3}(B)(7)[/tex]

[tex]192.9=(B)(7)[/tex]

[tex]B=192.9/(7)=27.56\ cm^{2}[/tex]

The equation that can be used to determine the area of the circular lid needed to cover the bird feeder is 64.3 = 1/3 x b x 7.

A cone is a three-dimensional shape that consists of a circular base and a vertex.

Volume of a cone = 1/3πr²h

Area of a circle = πr²

πr = 64.3 = 1/3 x b x 7

To learn more about the volume of a cone, please check: https://brainly.com/question/13705125

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The trim is the frame minus the glass.

[tex]A = (5x+3)(x+6) - (4x^2 + 26x + 15)[/tex]

[tex] = 5x^2+33x+18 - 4x^2 -26x - 15[/tex]

[tex] =x^2+7x+3[/tex]

Answer: Choice A

Answer with Step-by-step explanation:

A window frame has a length of (5x + 3) inches and a width of (x + 6) inches.

Area of window frame=(5x+3)(x+6)

                                    = 5x(x+6)+3(x+6)

                                    = 5x²+30x+3x+18

                                   = (5x²+33x+18) square inches

area of the glass in the window is (4x² + 26x + 15) square inches.

Area of trim around the glass=Area of window frame-Area of glass

                                                = 5x²+33x+18-(4x²+26x+15)

                                                =5x²-4x²+33x-26x+18-15

                                                =(x²+7x+3) square inches

Hence, Correct option is:

A. (x² + 7x + 3) square inches

Answer:

i would say b

Step-by-step explanation:

Answer:

b: cylinder

Step-by-step explanation:

because it's shaped like one

Answer:

Jason's collection: 21 books.

Nathan's collection 24 books.

Step-by-step explanation:

Let number of books owned by Jason be j books and that for Nathan be n books.

So we have the system:

6j + 1/3 n = 134.........(1)

1/3j + n = 31................(2)

Multiply the first equation by -3. We get:

-18j - n = -402............(3)

Adding (2) + (3):

-53/3 j = -371

j = -371 * 3 / -53

j =  21.

Now substitute j = 21 in equation (2):

1/3(21) + n = 31

n = 31 - 7 = 24

n = 24.

Answer: D

Step-by-step explanation:

For this case we must find the product of the following expressions:

[tex]\frac {3x} {x + 1} * \frac {x} {x-7}[/tex]

So:

[tex]\frac {3x ^ 2} {x ^ 2-7x + x-7} =\\\frac {3x ^ 2} {x ^ 2-6x-7}[/tex]

So, we have to:

[tex]\frac {3x} {x + 1} * \frac {x} {x-7} = \frac {3x ^ 2} {x ^ 2-6x-7}[/tex]

Answer:

[tex]\frac {3x ^ 2} {x ^ 2-6x-7}[/tex]

Option C

Answer:

[tex]-5m^2+7m+8[/tex]

Step-by-step explanation:

We are given the equations

[tex](-m^2+6)+(-4m^2+7+2)[/tex]

We need to combine like terms. As there are no exponents or numbers outside the parenthesis, we can just drop them and add all like terms

[tex]-m^2+6-4m^2+7m+2\\\\-5m^2+7m+8[/tex]

The angle of 110° and the angle labelled as 1 form 180°, so we have

[tex]<1> = 180-110=70[/tex]

The same holds for the angle labelled 2 and the 115° angle:

[tex]<2> = 180-115=65[/tex]

Angle 1, 2 and 7 are the interior angles of a triangle, so they sum to 180. We can deduce

[tex]<7> = 180-70-65=45[/tex]

Angles 5 and 7 are corresponding angles, so they have the same measure.

Answer:

both sets have the same number of points

Answer:

It is d.

Step-by-step explanation:

They have different medians and modes.  The 7th grade results , as you would expect, show better results than the 5th grade data.

The total cost y varies directly with the number of hours x needed to complete a job, with a direct variation coefficient of 100.

When analyzing the variation between two variables, specifically how y varies with x, we consider whether the relationship is direct or inverse. In the scenario provided, where it takes 10 workers 24 hours to do a job, if we let x represent the number of hours it takes to get the job done and y represent the total cost to the customer, we can establish that as the number of hours increases, the total cost also increases, assuming workers are paid by the hour. This suggests a direct variation.

Given that widget workers receive $10 per hour, the cost y to the customer for x hours of work would be 10 workers × $10 per hour × x hours. So, y = 10 × 10 × x = 100x. Hence, the relationship between y and x is directly proportional with a coefficient of variation of 100.

Answer:

(x, y ) → (x - 8, y + 11)

Step-by-step explanation:

L(7, - 3) and L'(- 1, 8)

The x-coordinate 7 → - 1 , that is a shift of - 8

The y- coordinate - 3 → 8, that is a shift of + 11

The rule to translate LMN → L'M'N' is

(x, y ) → (x - 8, y + 11 )

Answer:

y=9x+1.6

Step-by-step explanation:

bring the 10.6 over by adding it to both sides

Answer:

bro ur wrongf its y – 10.6 = 9(x – 1)

Step-by-step explanation:

BRO U BOT

Answer:

42.5%

Step-by-step explanation:

Answer:

42.5

Step-by-step explanation:

34/80×100/1

=340/8

=42.5

We can use the law of cosines as follows:

[tex]7^2 = 8^2+10^2-2\cdot 8 \cdot 10 \cdot \cos(\theta)[/tex]

We can rewrite this equation as

[tex]49 = 164-160 \cdot \cos(\theta) \iff 160 \cdot \cos(\theta) = 115 \iff \cos(\theta)=\dfrac{115}{160}\approx 0.72[/tex]

For this case we have by definition of the Cosines Law that:

[tex]7 ^ 2 = 10 ^ 2 + 8 ^ 2-2 (10) (8) [/tex]* cosΘ

[tex]49 = 100 + 64-160[/tex]cosΘ

[tex]49 = 164-160[/tex]cosΘ

[tex]49-164 = -160[/tex]cosΘ

[tex]-115 = -160[/tex]cosΘ

[tex]115 = 160[/tex]cosΘ

cosΘ= [tex]\frac {115} {160} = 0.71875[/tex]

Rounding off we have, 0.72

ANswer:

Option C

Answer:

The total liters of oil in the first container originally was 32 liters

total liters of oil in the second container originally was 64 liters

Step-by-step explanation:

Let

x----> total liters of oil in the first container originally

y----> total liters of oil in the second container originally

we know that

y=2x ----> equation A

(y-7)=3(x-13) ----> equation B

substitute equation A in equation B

(2x-7)=3(x-13)

2x-7=3x-39

3x-2x=39-7

x=32 liters

Find the value of y

y=2(32)=64 liters

Answer:

25.8

Step-by-step explanation:

114 ft ---> 31 inches

114 ft = 1368 inches

31/1368=0.02266081871 inch scale model

95 feet = 1140 inches, so 1140 * the scale factor of 0.02266081871= 25.83333..

This means, to the nearest tenth inch, the wingspan of the scale model is 25.8

The wingspan of the scale model is approximately 25.8 inches when calculated using the scale factor based on the model's length and the actual length of the plane, both in inches.

To find the wingspan of the scale model, we need to set up a proportion based on the scale between the actual size and the model size of the plane. First, we will find the scale factor by comparing the actual length of the plane to the length of the model in the same units:

Actual length of plane: 114 ft

Model length of plane: 31 inches

We must convert the actual length into inches because the model is measured in inches (1 foot = 12 inches) 114 feet × 12 inches/foot = 1368 inches

The scale factor is the ratio of the model length to the actual length.

Scale Factor = Model Length / Actual Length in inches = 31 inches / 1368 inches

Now, to find the wing span of the model, we use the same scale factor:

Actual wingspan of plane: 95 ft

95 ft × 12 inches/ft = 1140 inches (Actual wingspan in inches)

Model Wingspan = Actual Wingspan in inches × Scale Factor

= 1140 inches × (31 inches / 1368 inches)

We calculate this to get the model's wingspan in inches and round it to the nearest tenth of an inch:

Model Wingspan = (1140 × 31) / 1368 ≈ 25.8 inches

Therefore, the wingspan of the scale model is approximately 25.8 inches when rounded to the nearest tenth.