Solve by elimination. 7x+3y=25 -2x-y=-8

Answer: A

Step-by-step explanation:

m(x) = x² + 2  

n(x) = 5x + 9

(m*n)(x) = (x² + 3)(5x + 9)

            = x²(5x + 9) + 3(5x + 9)

            = 5x³ + 9x² +  15x + 27

Answer:

[tex]5x^3 +9x^2 +15x+27[/tex]

Step-by-step explanation:

If m(x) = x2 + 3 and n(x) = 5x + 9,

(mn)(x) is (m times n)(x)= m(x) times n(x)

m(x)  * n(x)

Plug in m(x) and n(x). then multiply it

m(x)  * n(x)

(x^2 + 3)(5x+9)

Apply FOIL method to multiply it

x^2 * 5x = 5x^3

x^2 * 9 = 9x^2

3*5x= 15x

3*9 = 27

[tex]5x^3 +9x^2 +15x+27[/tex]

Answer:

he can fill 4 bag

i think he will have 4 or 6 left

Step-by-step explanation:

38/8= 4.75

.75/8=6

Answer:

4 bags and 6 apples

or

4.75 bags of apples

Step-by-step explanation:

First, take 38 divided by 8. You get 4.75. That means 4 bags have been filled up.

Next take 8 times 4. you get 32. then take 38-32 and you get 6.

That means there is 4 bags of apples and 6 left over. You could also say 4.75 bags are filled.

This was a different way of awnsering it so I hope this helps. This is how I do it.

Answer:

[tex]\frac{3}{12} and \frac{8}{12}[/tex] are the fractions with common denominator

Step-by-step explanation:

fractions are  1/4 and 2/3

[tex]\frac{1}{4} and \frac{2}{3}[/tex]

To get common denominator we take LCD

LCD of 4  and 3 is 12

To get 12 in the denominator we multiply first fraction by 3  and second fraction by 4

[tex]\frac{1*3}{4*3} and \frac{2*4}{3*4}[/tex]

[tex]\frac{3}{12} and \frac{8}{12}[/tex]

Answer:

If it was 750,000 liters it would be 750 liters

Step-by-step explanation:

Bill can solve this by first thinking that 1 liter is 1,000 milliliters. Then 1,000 times 750 equals 750,000. Then he would do 750 times 1 and get 750. Bill would then realize that  750,000 milliliters is equal to 750 liters

Jake reaches the top of the escalator because he exceeds the height of the escalator if he travels at the rate of 8.33 inches/second.

Unit rate is the ratio of two different units, with denominator as 1. For example, kilometer/hour, meter/sec, miles/hour, salary/month, etc. Arithmetic is probably the most basic and ancient branch of mathematics and is quite commonly used in our day-to-day life.

Given here: Jake reaches 25 inches above the ground in 3 seconds.

The unit rate of Jake's ascend is = 25/3

                                                =8.33 inches/second

If Jake rides the escalator for 15 seconds then we would climb

=8.33×15

=124.95 inches

After 45 seconds Jake would have climbed =45×8.33

                                                                          =374.85 inches

Thus after 45 seconds Jake reaches the top of the escalator.

Hence, Jake reaches the top of the escalator because he exceeds the height of the escalator if he travels at the rate of 8.33 inches/second.

Learn more about the unit rate here;

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Answer:

21

Step-by-step explanation:

To find Jeff's age, we set up an algebraic equation based on the problem given. By isolating the variable and solving the equation, we determine that Jeff is 7 years old.

The problem presented is a basic algebraic equation that can be translated to: 5 + 2 * Jeff's age = 3 * Jeff's age - 2. To solve for Jeff's age, we follow these steps:

Jeff is 7 years old.

Answer:

18 kg

Step-by-step explanation:

Recycling rate = 12 kg/6wk

Recycled = 9 × 12/6

Recycled = 9 × 2

Recycled = 18 kg

Answer:

A=6 and B=4.5

Step-by-step explanation:

You are given table

[tex]\begin{array}{cccccc}x&2&4&[A]&7&9\\y&1&2&3&3.5&[B]\end{array}[/tex]

If the paired values are in a proportional relationship, then

[tex]\dfrac{2}{1}=\dfrac{4}{2}=\dfrac{[A]}{3}=\dfrac{7}{3.5}=\dfrac{9}{[B]}.[/tex]

Note that

[tex]\dfrac{2}{1}=\dfrac{4}{2}=\dfrac{7}{3.5}=2,[/tex]

then

[tex]\dfrac{[A]}{3}=2\Rightarrow [A]=6,\\ \\\dfrac{9}{[B]}=2\Rightarrow [B]=\dfrac{9}{2}=4.5.[/tex]

Answer:

the answer is 6  

Step-by-step explanation: im 100% right this guy is wrong i repeat this guy is wrong!

Answer:

-16 =x

Step-by-step explanation:

−6 = 3/8x

Multiply each side of the equation by 8/3 to isolate x

-6 *8/3 = 8/3* 3/8 x

-48/3 = x

-16 =x

Answer:

Step-by-step explanation:

-6=3/8x

To make this easier to visualize:

3/8= 0.375

-6=.375x

Divide both sides by .375

The right side cancels.

-6/.375=-16

So x=-16

Answer: 0.4 miles

Step-by-step explanation:

You can use the equation y=1/5x to help you figure it out where x is the days and y is the length. y=1/5(2). y=2/5 or 0.4 miles. Please vote my answer as brainliest

The road construction crew would pave 2/5 of a mile in 2 days, as they pave 1/5 mile every day.

The road construction crew paves 1/5 mile each day. If they were to work for 2 days, to find out how much they would pave, you would simply multiply the pace per day by the number of days. So, 1/5 mile * 2 days = 2/5 miles. Therefore, the crew would pave 2/5 of a mile in 2 days.

To find out how much the road construction crew would pave in 2 days, we need to multiply the amount they pave in 1 day by 2. So, if they pave 1/5 mile every day, they would pave 1/5 * 2 = 2/5 mile in 2 days.

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Answer:

Option B is correct.

the value of discriminant is, -7

Step-by-step explanation:

Given the equation: [tex]x^2 + x +2 = 0[/tex]

To find the value of discriminant [tex]b^2-4ac[/tex]

A quadratic equation is of the form [tex]ax^2+bx+c = 0[/tex] where a, b and c are coefficient of the equation.

On comparing with given equation we have;

a  = 1 , b = 1 and c = 2

then;

Discriminant = [tex]b^2-4ac =(1)^2 -4(1)(2) =1 -8 = -7[/tex]

Therefore, the value of discriminant is, -7

Answer: 2 hours

Step-by-step explanation:

Answer:

0.8 ounces each student

Step-by-step explanation:

You divide 4 by 5 and get your response.

Answer:

.8 ounces (could be written 4/5)

Step-by-step explanation:

5 students, 4 ounces. divide ounces by students, so 4/5

Answer:

Step-by-step explanation:

f(x) = 2(x + 6)

f(x) = 22

thereofre we have the equation:

2(x + 6) = 22      use distributive property

2x + 12 = 22     subtract 12 from both sides

2x = 10     divide both sides by 2

x = 5

Answer:

red  1/2,

blue  2/5  

The lines do not have the same slope so they are  not parallel

Step-by-step explanation:

We can find the slope of the red line by using the formula

m = (y2-y1)/(x2-x1)

  We have the points (0,1) and (2,2)

m= (2-1)/ (2-0)

  = 1/2

We can find the slope of the blue line by using the formula

m = (y2-y1)/(x2-x1)

  We have the points (0,-5) and (5,-3)

m= (-3--5)/ (5-0)

  = (-3+5)/(5-0)

  = 2/5

The lines  do not have the same slope so they are  not parallel

Answer:

Option B.

Step-by-step explanation:

The given graph is of a line which is parallel to the x axis.

Let the equation of the line is y = mx + c

where m is the slope and c is a constant representing y - intercept.

Since the graphed line is parallel to x = 0

So for the values of x = 0 equation of the line will be

y = c (constant)

Therefore, Option B. Linear constant is the answer.

Answer:

700

Step-by-step explanation:

280 / 0.40 = 700

Answer:

280 *0.40 +96 STUDENTS

or

280/100  = x/40 cross multiply

9600=100x divide by 100

x=96

Step-by-step explanation:

25 can go into 212 a total of 8 times with a remainder.

 To determine how many times 25 can go into 212, we perform the division of 212 by 25.

This is a simple division problem where we are looking for the quotient, which represents the number of times 25 can be subtracted from 212 before the remainder is less than 25.

  Let's perform the division:

 [tex]\( \frac{212}{25} = 8 \)[/tex] with a remainder of 12.

This means that 25 can be multiplied by 8 to get as close as possible to 212 without exceeding it.

The difference between 212 and 200 is 12, which is the remainder.

  Therefore, 25 can go into 212 a total of 8 times with a remainder of 12."

Answer:

The value not permissible for a is -3.

Step-by-step explanation:

Considering real numbers, the expression is undefined for any value a for which the denominator expression is zero.

[tex]\frac{a^2}{2a+6}, \,\,\,2a+6\neq 0\implies a\neq -3[/tex]

The expression is valid for all real numbers, except -3.

Answer:

a≠-3

Step-by-step explanation:

We cannot divide by zero, so the denominator cannot be zero

2a+6≠ 0

Subtract 6 from each side

2a+6-6≠ 0-6

2a ≠-6

Divide each side by 2

2a/2 ≠-6/2

a≠-3

Answer:

6x^2y^3

Step-by-step explanation:

6x^2y^4+18x^3y^5-12x^5y^3

Lets check the coefficients first:-

6, 18, 12 - The GCF is 6.

x terms:-  x^2, x^3 and x^5 . The GCF is x^2.

y terms:- y^4, y^5 and y^3. The GCF is y^3.

Answer:

6x^2y^3

Step-by-step explanation:

6x^2y^4+18x^3y^5-12x^5y^3

Lets break each term into prime factors

6x^2y^4  =3*2*x*x*y*y*y*y

18x^3y^5 = 9*2^3y^5  = 3*3*2*x*x*x*y*y*y*y*y

12x^5y^3 = 4*3x^5y^3 = 2*2*3*x*x*x*x*x*y*y*y

Each has one 2, one 3, two x's and three y's

So the greatest common factor is

2*3*x*x*y*y*y

6x^2y^3

Answer:

7/8

Step-by-step explanation:

Step 1: Change the denominators so that they are the same for both fractions

7/8 x 15 = 105/120

13/15 x 8 = 104/120

Step 2: Compare

104/120 < 105/120 = 13/15 < 7/8

The fraction 7/8 is bigger than 13/15.

To determine which fraction is bigger between 7/8 and 13/15, we need to find a common denominator. The least common multiple of 8 and 15 is 120. Now, we can convert both fractions to have the same denominator:

7/8 = 105/120

13/15 = 104/120

Since 105/120 is larger than 104/120, the fraction 7/8 is bigger than 13/15.

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Answer:

The exact answer is 27 * pi

or the approximate answer is 27 * 3.14 = 84.78

Step-by-step explanation:

First step is to find the area of the circle

A = pi * r^2

A = pi * 6^2

A = 36* pi

We are missing 90  degrees of the circle  or 90 out of 360.

That means we keep 360 - 90 = 270  or 270/360

The fraction we are keeping simplifies to 3/4  (divide top and bottom by 90)

Multiply the area by the fraction that we kept.

36 pi * 3/4 = 27 * pi

The exact answer is 27 * pi

or the approximate answer is 27 * 3.14 = 84.78

Answer: Quick market

Step-by-step explanation:

At quick market each apple is .43 each

At Stop and Save they are .50 each

Answer:A

Step-by-step explanation:

because standard form is ax+by=c

so multiply one half to both side and it cancancel

Answer:

The correct answer option is C. y<= -4x + 25.

Step-by-step explanation:

Firstly, we will find out the equation of the line with the help of using two points (0, 25) and (-6, 49).

The slope (m) = [tex]\frac{49-25}{-6-0} =-4[/tex].

We know the standard form of the equation is [tex]y=mx+c[/tex] so the y-intercept (c) can be found by putting in the values of the slope and the coordinates of a point.

[tex]25=-4(0)+c\\\\c=25[/tex]

Therefore, the equation of the line is y = -4x + 25.

Now since the inequality is dealing with the value of y and we know that the values of y go vertically (up and down). So if we look at the graph, the shaded area includes the smaller values of y and the line is a solid one.

Therefore, the inequality will be y<= -4x + 25.

If you don't understand it this way, you can pick up a point and test the inequality.

Taking the easiest point (0, 0) to check.

0 <= -4 (0) + 25

0 <= 25 --- True

Answer:

x = 10

Step-by-step explanation:

2.1   Adding a fraction to a whole  

Rewrite the whole as a fraction using  10  as the denominator :

          7x     7x • 10

    7x =  ——  =  ———————

          1        10    

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole  

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2       Adding up the two equivalent fractions  

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

7x • 10 + 1     70x + 1

———————————  =  ———————

    10            10    

Final result :

 70x + 1

 ———————

   10    

Processing ends successfully

Answer:

SAS

Step-by-step explanation:

AD = DC             Given

<ADB = <CDB    Givien

BD = BD              Reflexive property.

The angle is between the 2 sides. The triangles are congruent by SAS.