3x + 7x - 8 = -19 , evaluate .

Answer:

80

Step-by-step explanation:

8 pints in a gallon so then you multiply 8 x 10 and get 80

Answer:

They all look right but i'm not sure about the last one?

Step-by-step explanation:

Answer:

A) False

B) True

C) True

D) False Solution is actually (-3, -3)

work below

Note: Used Elimination Method

Multiply the first equation by -2,and multiply the second equation by 1.

−2(−2x+y=3)

1(3x+2y=−15)

Becomes:

4x−2y=−6

3x+2y=−15

Add these equations to eliminate y:

7x=−21

Then we solve 7x = −21 for x:

7x = −21

7         7

(we Divide both sides by 7)

x=−3

Now that we've found x let's put it back in to solve for y.

Put down an original equation:

−2x+y=3

Substitute−3 for x in−2x+y=3:

(−2)(−3)+y=3

y+6=3(Simplify both sides of the equation)

y+6+−6=3+−6(Add -6 to both sides)

y= −3

Solution

(-3, -3)

Answer:

Step-by-step explanation:

You can solve 6a + 6c =126 for either a or c, but until you have a second equation in either a or c or both, you cannot find the values of a and c.

6a + 6c =126 reduces to 6(a + c = 23), or just a + c = 23.  Then either a = 23 - c or c = 23 - a, but we cannot find a or c as a specific numeric value.

Answer:

His balance is $3778.28

Answer:

Step-by-step explanation:

Given the data set of 15 where:

As per given we conclude

a) Possible set is:

b) Add number 20, the set will be:

The mean is different as we have now more numbers with different sum:

The median is different now and moves to the right as 20 added to the far right:

The mode stays same as still most used number is 5:

Answer: 2572.44

V=(4/3)πr^3 (the formula for volume of sphere)

plug in 17/2 for r  (17 is the diamater and r is the radius which is half of the diamater)

Put this in calc

(4/3)π17/2^3

You get 2572.44

Answer: If it was the same day, then it was 6:20. But if it was the next day, then i don't know.

Step-by-step explanation:

there are 4 people there

Answer:

more info

Step-by-step explanation:

Answer:

[tex]y = \frac{5}{2}x-1[/tex]  

Step-by-step explanation:

Slope-intercept form is represented by the formula [tex]y = mx + b[/tex]. So, to place the given equation in slope-intercept form, isolate the y on the left side and arrange the terms in that matching order. Remember, whatever you do to one side, do to the other:

[tex]5x-2y = 2\\-2y = -5x + 2\\\frac{-2}{-2}y = \frac{-5}{-2} x+\frac{2}{-2} \\y = \frac{5}{2} x-1[/tex]

So, the slope-intercept form is [tex]y = \frac{5}{2}x-1[/tex].

Answer:

c

Step-by-step explanation:

Answer:

5x−4=y 5 x - 4 = y . Add 4 to both sides of the equation. Divide each term by 5 and simplify. Divide each term in 5x=y+4 5 x = y + 4 by 5 5 .

Here's the answer I hope this helps you

Step-by-step explanation:

8 :)

Step-by-step explanation:

Answer:

120 cm, 160 cm, 80 cm, 360 cm

Step-by-step explanation:

The ratio 3:4:2:9 is the same as the ratio 3x:4x:2x:9x

We add all the terms of the second ratio:

3x + 4x + 2x + 9x = 18x

18x = 720

x = 40

3x = 3(40) = 120

4x = 4(40) = 160

2x = 2(40) = 80

9x = 9(40) = 360

Answer: 120 cm, 160 cm, 80 cm, 360 cm

Answer:

12/(n-1)=10/(n+3). 12n−1=10n+3 12 n - 1 = 10 n + 3

Step-by-step explanation:

Answer:

MATHPAPA.COM

Step-by-step explanation:

Go to MATHPAPA.Com and use the Algebraic Calculator  

Answer:

56÷2=28

Circumference=2×3.142×r

c= 2×3.142×28=175.952

hundredth =175.95cm

Area=3.142×r^2

A= 3.142×28^2=2463.328

hundredth =2463.33cm^2

Answer:

Step-by-step explanation:

Length of each side = √(169/36)

= √169/√36

= 13/6 yards

Perimeter = 4(13/6) = 26/3 yards

Perimeter of the flower bed is 26 / 3  yards

Given:

[tex]Area\ of\ square\ flower\ bed\ = \frac{169}{13} square\ yard\\\\[/tex]

Find:

Perimeter of the flower bed

Computation:

Area of square = side²

So,

[tex]Area\ of\ square\ flower\ bed\ = \frac{169}{13} square\ yard\\\\Side^2 = \frac{169}{36} \\\\Side^2 = [\frac{13}{6}]^2 \\\\Side = \frac{13}{6} \ yard[/tex]

Perimeter of square = 4(Side)

[tex]Perimeter\ of\ the\ flower\ bed = 4(\frac{13}{6} ) \\\\Perimeter\ of\ the\ flower\ bed = \frac{26}{3} \ yards[/tex]

Learn more:

https://brainly.com/question/16744443?referrer=searchResults

They are not equal they are not complementary angles or any other equality.

Answer:

x = ± 2

Step-by-step explanation:

x² + 6 = 10

x² = 4

x = [tex]\sqrt{4}[/tex]

x = ±2

Answer:

the answer is 2.... what in the works the answer isn't on there

Answer:

Step-by-step explanation:

2 1/5 is equivalent to 0.022.  Yes, 0.0215 is less than 0.022.

This is clearer if you write the two values in a column:

0.0220  (larger than 0.0215)

0.0215   (smaller than 0.0220)

Answer:

D.

Step-by-step explanation:

The whole point of a line graph is keep track of data that is always changing. For example, a line graph would be used to track the change in weather.

Answer:

Nope

Step-by-step explanation:

It is an odd number, wouldn't be able to fit in a perfect square where all sides are the same length.

Answer:

y=2x-5

Step-by-step explanation:

Slope intercept form is y=mx+b, with m being the slope and b being the y-intercept.

Slope is found through (y2-y1)/(x2-x1) and when the values are plugged in you get (-3-1)/(1-3) which equals -4/-2 or 2.

y=2x+b

Since b is the y-intercept, you plug in the value of the point where the line crosses over the y axis. In this case, that value is -5, so you get y=2x-5.

Answer:

The correct answers are;

4 * 3 1/4

3 1/4 + 3 1/4 + 3 1/4 + 3 1/4

13/4 + 13/4 + 13/4 + 13/4

Step-by-step explanation:

Given 4 ropes each 3 1/4 feet long

1 rope = 3 1/4 feet long

4 ropes = x

cross multiply

1 * x = 4 * 3 1/4

x = 4 * 3 1/4

Since 3 1/4 is in 4 places, the total length can also be expressed as;

3 1/4 + 3 1/4 + 3 1/4 + 3 1/4

We can also rewrite as an improper fraction

Since 3 1/4 = 13/4

Total length = 13/4 + 13/4 + 13/4 + 13/4

Answer:

Sketch of a cube with side = 4 in as shown.

The shaded area is perpendicular to the right and left vertical faces of the cube, so the cross section is a square with each side equal to 4 in.

The area of the cross section is

4*4 = 16 in²

The perimeter of the cross section is

4+4+4+4 = 16 in.

Answer:

16 and 16

Step-by-step explanation:

Answer:

Step-by-step explanation:

The slope of the line passing through two given points:  [tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

(3, 4)   ⇒   x₁ = 3,  y₁ = 4

(8, -3)   ⇒     x₂ = 8,  y₂ = -3

So, the slope:

                     [tex]m=\dfrac{-3-4}{8-3}=\dfrac{-7}{5}=-1\dfrac25[/tex]

Answer:

I think 0.02495

Step-by-step explanation:

I'm not sure :/