Someone please help for grade‼️

If we let m represent the number of months, then the population increase of the first town is 100m and its decrease is 200m. The population decrease of the second town is 175 m.

We want to find m such that the increases and decreases make the towns' populations equal. We add the increases and subtract the decreases to the base population in each case.

... first town population = second town population

... 53075 -100m +200m = 55825 -175m . . . . . the model equation

Solution

... 100m = 2750 -175m . . . . . collect terms, subtract 53075

... 275m = 2750 . . . . . . . . . . add 175m

... m = 10 . . . . . . . . . . . . . . . . . divide by 275

The populations will be equal in 10 months.

Answer:

175m-125m+38,200=40,600-150m

Step-by-step explanation:

I just completed it on imagine math

Answer:

$51

Step-by-step explanation:

To solve this, we must divide the total amount of miles by the miles per gallon, and multiply that by the cost per gallon.

430 / 26 = 16.53

Because this is talking about gallons, we should round up to 17.

17 * 3 = 51

It costs $51 to drive 430 miles when gasoline costs $3 per gallon.

Answer:

$49.62

Step-by-step explanation:

We know that the car travels for 26 miles in 1 gallon. So we will find out the number of gallons it requires to travel for 430 miles by simple ratio method.

[tex]\frac{1 gallon}{x} =\frac{26 miles}{430}[/tex]

[tex]x=\frac{430}{26}[/tex]

[tex]x=16.54[/tex]

Now that we know that the car needs 16.54 gallons of gasoline to drive for 430 miles, we can simply multiply the number of gallons by the cost per gallon to find its total cost.

Total cost of gasoline to drive 430 miles = 16.54 x 3 = $49.62

Answer:

132(X) + 64(2X) = $1040.00

Step-by-step explanation:

equations

solution

a. It usually works well to let a variable represent the quantity the problem statement is asking you to find. I like to choose variable names that help me remember what the variable stands for. (x and y rarely do that) So, let's choose "a" for the cost of an adult ticket, and "s" for the cost of a student ticket.

The equations express the relationships described by the problem statement. The first relationship expresses the total revenue in terms of the numbers of tickets sold. You know that multiplying the number of tickets by the cost of the ticket will give the revenue from sales of that ticket. So, the total revenue is ...

... 64a +132s = 1040

The problem statement also tells you the relationship between the costs. An adult ticket is twice the cost of a student ticket, so ...

... a = 2s

These equations are your system of linear equations.

_____

b. The solution can be found using substitution. Since the second equation gives an expression for "a", we can use that in the first equation.

... 64(2s) +132s = 1040

... 260s = 1040 . . . . . . . . simplify

... 1040/260 = s = 4

... a = 2s = 2·4 = 8

An adult ticket costs $8; a student ticket costs $4.

36 cm

Let s represent the side of the square in cm. Then s+3 and s-2 are the sides of the rectangle of interest.

The area of the rectangle is the product of its side lengths:

... rectange area = (s+3)(s-2) = s² +s -6

The area of the square is the product of its side lengths, both of which are s.

... square area = s²

The difference of these areas is 30 cm², so ...

... rectangle area - square area = 30

... (s² +s -6) -(s²) = 30

... s = 36 . . . . . . . . . . . . simplify, add 6

The side of the square is 36 cm.

_____

Check

The rectangle dimensions are 39 cm by 34 cm, so its area is

... (39 × 34) cm² = 1326 cm²

The area of the square is (36 cm)² = 1296 cm²

The difference in areas is (1326 -1296) cm² = 30 cm², as required.

Answer:

D) 15

Step-by-step explanation:

We know the formula for direct variation is

y=kx

Substituting y=5 and x=4 we can calculate k

5=k4

Divide each side by 4

5/4 =k

Now y= 5/4 x

If x =12

y =5/4*12

y = 15

[tex]\bf \textit{exponential form of a logarithm} \\\\ log_a b=y \implies a^y= b\qquad\qquad a^y= b\implies log_a b=y \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ y=\log_4(0.25) ~\hfill 0.\underline{25}\implies \cfrac{025}{1\underline{00}}\implies \cfrac{1}{4}\implies 4^{-1} \\\\\\ y=\log_4\left( 4^{-1} \right)\implies 4^y=4^{-1}\implies y=-1[/tex]

Answer:

The correct option is A. The height of tree is 60 ft.

Step-by-step explanation:

From the given figure it is noticed that the building is creating a right angle triangle from a point and the tree divides the hypotenuse and base in two equal part.

According to midpoint theorem of triangle: In a triangle, if a line segment connecting the midpoints of two sides, then the line is parallel to third side. The length of line segment is half of the length of third side.

Using midpoint theorem of triangle, we can say that the length of tree is half of the building.

[tex]Tree=\frac{1}{2}\times Building[/tex]

[tex]Tree=\frac{1}{2}\times 120[/tex]

[tex]Tree=60[/tex]

Therefore correct option is A. The height of tree is 60 ft.

Answer:

Step-by-step explanation:

riders : walkers = 10 : 1

The ratio tells you that 10 students ride the bus for every 1 student that walks. Since 10 is more than 1, more students ride the bus.

We know more students are riders, because we know that 10 is more than 1.

Answer:

D -5/12

Step-by-step explanation:

2 1/2 = 2·(2/2) + 1/2 = 5/2

Dividing by 6 is the same as multiplying by 1/6.

... (-5/2)×(1/6) = -5·1/(2·6) = -5/12

Answer:

a) [tex]-5x^{2}+3x+27[/tex]

b) [tex]-5x^{2}+3x+9[/tex]

Step-by-step explanation:

a) Let the required polynomial be p(x).

We have the relation, [tex]5x^{2}-3x-9[/tex] + p(x) = 18

i.e. p(x) = 18 [tex]-5x^{2}+3x+9[/tex]

i.e. p(x) = [tex]-5x^{2}+3x+27[/tex]

b) Let the required polynomial be q(x).

We have the relation, [tex]5x^{2}-3x-9[/tex] + q(x) = 0

i.e. q(x) = 0 [tex]-5x^{2}+3x+9[/tex]

i.e. q(x) = [tex]-5x^{2}+3x+9[/tex]

Answer:

(a) [tex]-5x^2+3x+27[/tex]

(b)  [tex]-5x^2+3x+9[/tex]

Step-by-step explanation:

(a)

Let the polynomial be Q(x).

Given polynomial P(x) = [tex]5x^2-3x-9[/tex]

As per the given statement: A polynomial(Q(x)) which, when added to the polynomial [tex]5x^2-3x-9[/tex], is equivalent to 18.

[tex]P(x)+Q(x) = 18[/tex]

[tex]5x^2-3x-9 +Q(x) = 18[/tex]

⇒[tex]Q(x) = 18 -(5x^2-3x-9)[/tex]

or

[tex]Q(x) = 18 -5x^2+3x+9[/tex]

Simplify:

[tex]Q(x) =-5x^2+3x+27[/tex]

Therefore, the polynomial is,  [tex]-5x^2+3x+27[/tex]

Check:

[tex]P(x)+Q(x)[/tex] = [tex]5x^2-3x-9 +(-5x^2+3x+27)[/tex]

                      = [tex]5x^2-3x-9 -5x^2 +3x+27[/tex]

                       = 18

(b)

Let the polynomial be Q(x).

Given polynomial P(x) = [tex]5x^2-3x-9[/tex]

As per the given statement: A polynomial(Q(x)) which, when added to the polynomial [tex]5x^2-3x-9[/tex], is equivalent to 0.

[tex]P(x)+Q(x) = 0[/tex]

[tex]P(x) = -Q(x)[/tex]

⇒[tex]Q(x) = -(5x^2-3x-9)[/tex]

or

[tex]Q(x) = -5x^2+3x+9[/tex]

Therefore, the polynomial is,  [tex]-5x^2+3x+9[/tex]

Check:

[tex]P(x)+Q(x)[/tex]=[tex]5x^2-3x-9 +(-5x^2+3x+9)[/tex]

                      = [tex]5x^2-3x-9-5x^2 +3x+9[/tex]

                       = 0

Answer:

6/x weeks

Hope this helps

Answer:

6/x weeks

Step-by-step explanation:

This is the correct answer, credits to the other person who answered.

Answer:

A. 18.25

Step-by-step explanation:

After you do the multiplications, the problem is

... (56 +90)/8 = 146/8 = 18.25

_____

The division bar is a grouping symbol, equivalent to parentheses around both numerator and denominator. You must evaluate the numerator before you can divide by the denominator, which also must be evaluated before that division.

Answer:

5² - n  

Step-by-step explanation:

Five squared  = 5²

                     n =        n     Subtract n from 5²

                 Diff. = 5² - n

We indicate "taking the difference" by a "minus" sign, so all the other options are wrong.

Answer:

5² - n

Step-by-step explanation:

Five squared is written as = 5²

The symbol of n is n.

The term difference is subtraction.

The difference of five squared and n ⇒ 5² - n

Answer:

[tex]<\:3[/tex] is the angle of elevation from the boat to the lighthouse.

Step-by-step explanation:

From the boat, the angle through which you will raise your head to see the light house is the angle of elevation, which is [tex]<\:3[/tex].

See graph for the illustration.

The correct answer is A

Answer:

The angle of elevation from the boat to the lighthouse is:

First option: <3

Step-by-step explanation:

The angle of elevation from the boat to the lighthouse is the angle of the visual since the boat to the lighthouse with the horizontal, according with the graph this angle is <3 (First option)

2.54 cm/in

In this context, "constant of proportionality" and "unit rate" mean the same thing.

Answer:

7x^2y(x +2xy^2 -y)

Step-by-step explanation:

7, x^2, and y are factors of every term, so we can start by factoring those out.

... = 7x^2y(x +2xy^2 -y)

The trinomial does not factor further, so this is it.

Answer:

7x^2y(x +2xy^2 -y)

Step-by-step explanation:

7x^3y +14x^2y^3 − 7x^2y^2

WE find out GCF

7x^3y= 7*x*x*x*y

14x^2y^3= 7*2*x*x*y*y*y

7x^2y^2 = 7 *x*x*y*y

GCF is 7x^2y

Factor out GCF from the given expression. when we factor out 7x^2y we divide each term by GCF. we put GCF 7x^2y outside

7x^2y(x +2xy^2 -y)

Answer:

B) 6

Step-by-step explanation:

It is 45, 45, 90 degrees right triangle, the ratio of the triangle 1:1:√2

Hypotenuse = 3√2*√2

= 3*2

= 6

Thank you.

Answer:

6

Step-by-step explanation:

Hypotenuse is the side that is opposite of the 90 degree angle (the longest side as well).

As seen in the triangle, the side opposite of 45° angle is known AND we want to find the hypotenuse.

Which trigonometric ratio relates opposite with hypotenuse?

SINE

We can write:

[tex]sin(A)=\frac{opposite}{hypotenuse}\\sin(45)=\frac{3\sqrt{2}}{h}[/tex]

We let hypotenuse be [tex]h[/tex]. Also we know that [tex]sin(45)=\frac{1}{\sqrt{2}}[/tex]

Now we can solve for [tex]h[/tex]:

[tex]sin(45)=\frac{3\sqrt{2}}{h}\\h*sin(45)=3\sqrt{2}\\h=\frac{3\sqrt{2}}{sin(45)}\\h=\frac{3\sqrt{2}}{\frac{1}{\sqrt{2}}}\\h=3\sqrt{2}*\frac{\sqrt{2}}{1}\\h=6[/tex]

(we used the identity [tex](\sqrt{a})(\sqrt{a})=a[/tex])

2nd answer choice is right. Hypotenuse is 6.

Answer:

none of the above

Step-by-step explanation:

The grocer's revenue will be the product of the number of loaves sold (30-2x) and their price (2.50+0.50x).

Revenue will be positive for values of x between those that make these factors be zero. The number of loaves sold will be zero when ...

... 30 -2x = 0

... 15 -x = 0 . . . . . divide by 2

... x = 15 . . . . . . . add x

The price of each loaf will be zero when ...

... 2.50 +0.50x = 0

... 5 + x = 0 . . . . . . . multiply by 2

... x = -5 . . . . . . . . . . subtract 5

Revenue will be positive for any number of increases greater than -5 and less than 15.

_____

D is the best of the offered choices, but it is incorrect in detail. -5 is a number less than 15, but will give zero revenue.

Answer:

Step-by-step explanation:

We know:

The sum of the measures of the angles of the triangle is equal to 180 °.

Therefore we have the equation:

[tex]y+(y-12)+56=180[/tex]         combine like terms

[tex]2y+44=180[/tex]              subtract 44 from both sides

[tex]2y=136[/tex]           divide both sides by 2

[tex]y=68[/tex]

Answer:

24 gallons

Step-by-step explanation:

18 divided by 3 is 6

6 x 4 = 24

so there are 24 gallons as a whole

You said . . . . . 18 = 3/4 g

Multiply each side by 4 . . . 72 = 3g

Divide each side by 3 . . . 24 = g

Answer:

The measure of angle B is positive

Step-by-step explanation:

we know that

Positive angles are those measured counterclockwise.

therefore

in this problem

The measure of angle B is positive

Answer:

4^x+1

Step-by-step explanation:

because i got it wrong

Answer:

[tex]y= 4^{x+1}[/tex]

Step-by-step explanation:

x² + y² = 50

The circle centered at (h, k) with radius r has equation ...

... (x -h)² + (y -k)² = r²

You have (h, k) = (0, 0), so all we need to do is find r². We can do that by choosing r² so that the equation is true at the given point.

... x² + y² = (5)² + (-5)² = 25 + 25 = 50

Your equation is x² + y² = 50.

Answer:

(x, y) = (5, 1)

Step-by-step explanation:

To eliminate x, you can double the second equation and subtract the first.

... 2(x +4y) -(2x -3y) = 2(9) -(7)

...11y = 11 . . . . . simplify

... y = 1 . . . . . . divide by 11

Using the second equation to find x, we have ...

... x + 4·1 = 9

... x = 5 . . . . . subtract 4

_____

Check

2·5 -3·1 = 10 -3 = 7 . . . . agrees with the first equation

(Since we used the second equation to find x, we know it will check.)

Answer:

HL

Step-by-step explanation:

The two hypotenuses of these right triangles are marked congruent, and the leg QS is shared, hence congruent.

The HL theorem applies.

64

If each side length is multiplied by 8, the product of two side lengths will be multiplied by 8×8 = 64.

Area is proportional to the product of two side lengths, so will be multiplied by 64.

Answer:

about 82%

Step-by-step explanation:

The distribution of sample means has a standard deviation that is the pipe standard deviation divided by the square root of the sample size. Thus, the standard deviation of the sample mean is 0.003/√9 = 0.001.

Then the limits on sample mean are 1.010 - 1×0.001 = 1.009 and 1.010 +2×0.001 = 1.012. The proportion of the normal distribution that lies between -1 and +2 standard deviations is about 81.9%.

The problem involves statistical calculation involving mean, standard deviation, and Z-scores of a normal distribution. We first calculate sample standard deviation, then the Z-scores for the given range. After finding probabilities for the Z-scores, we subtract to get the final probability of 0.8185.

The problem at hand involves the field of statistics, specifically, the normal distribution, sample mean, and standard deviation. We can use the following steps to solve the problem:

https://brainly.com/question/34741155

#SPJ3

Answer:

x = −10 and x = 4

Step-by-step explanation:

x2 + 6x = 40

Subtract 40 from each side

x^2 + 6x -40 =0

Factor,  what 2 numbers multiply to -40 and add to 6

10 * -4 = -40    10+-4 = 6

(x+10) (x-4) = 0

Using the zero product property

x+10 =0     x-4=0

x=-10    x=4

Answer:

x = −10 and x = 4

Step-by-step explanation:

We are given the following quadratic equation and we are to solve it to find the two solution for the variable x:

[tex]x^2+6x=40[/tex]

Rearranging the equation by putting the constant on the same side as the variables to get:

[tex]x^{2} +6x-40=0[/tex]

Now factorizing it to get:

[tex]x^{2} -4x+10x-40=0\\\\x(x-4)+10(x-4)=0\\\\(x+10)(x-4)=0\\\\x= -10, x= 4[/tex]

Therefore, the solution to the given quadratic equation [tex]x^2+6x=40[/tex] are x = −10 and x = 4.