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3 years ago

What is 8+2x+7x equal

2 answers:

6 0

The answer is 8+9x

you have to combine the like terms.

the only like terms would be 2x and 7x.

8 cannot be combined with 2x or 7x, therefore we can just leave it.

adding 2x and 7x would equal to 9x, therefore the final answer is: 8+9x

Veseljchak [2.6K]3 years ago

5 0

I’m pretty sure it’s 9x+8

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Multiple Choice Suppose y varies directly as x. if y = 5 when x=8, find y when x=64

Juliette [100K]

Answer:

Step-by-step explanation:

y∞x

then

y=kx (with k as constant)

y=5 when x=8

⇒Putting this in the first equation

⇒5=k×8

⇒k=5/8

Now

y=? when x=64

Putting x=64 in the first equation

y=kx

⇒y=(5/8)×64

We get

y=40

Hope u understand

6 0

3 years ago

An auto repair shop charges $36 per hour, plus the cost of replaced parts. Which of the following expressions can be used to cal

aivan3 [116]

Answer:

44h

Step-by-step explanation:

Auto repair shop Charge - $36

Replaced Parts - $8

Number of Hours - h

Formula to find the total cost

(Auto Repair Shop Charge + Replaced Parts) x Number of Hours

= (36 + 8) x h

= 44 x h

= 44h

3 0

2 years ago

What is If a rectangular prism has a length, width, and height of centimeter, centimeter, and centimeter, respectively, then the

USPshnik [31]

Answer:

The volume is 105/512 cubic inches

Step-by-step explanation:

Given [Missing from the question]

$L = \frac{3}{8} cm$ -- Length

$W=\frac{5}{8}cm$ -- Width

$H = \frac{7}{8}cm$ -- Height

Required

Determine the volume.

The volume (V) is calculated as thus:

$V = L *W *H$

$V = \frac{3}{8} cm* \frac{5}{8}cm * \frac{7}{8}cm$

$V = \frac{3}{8} * \frac{5}{8} * \frac{7}{8}cm^3$

$V = \frac{3*5*7}{8*8*8}cm^3$

$V = \frac{105}{512}cm^3$

8 0

2 years ago

Gabe rounds 9.456 to the nearest hundredth. Then, he rounds the result to the nearest tenth. Last, he rounds that result to the

larisa86 [58]

Answer:

390

Step-by-step explanation:

4 0

2 years ago

The length of each side of an equilateral triangle is increased by 20%, resulting in triangle ABC. If the length of each side of

kompoz [17]

Answer: Area of ΔABC is 2.25x the area of ΔDEF.

Step-by-step explanation: Because equilateral triangle has 3 equal sides, area is calculated as

$A=\frac{\sqrt{3} }{4} a^{2}$

with a as side of the triangle.

Triangle ABC is 20% bigger than the original, which means its side (a₁) measures, compared to the original:

a₁ = 1.2a

Then, its area is

$A_{1}=\frac{\sqrt{3} }{4}(1.2a)^{2}$

$A_{1}=\frac{\sqrt{3} }{4}1.44a^{2}$

Triangle DEF is 20% smaller than the original, which means its side is:

a₂ = 0.8a

So, area is

$A_{2}=\frac{\sqrt{3} }{4} (0.8a)^{2}$

$A_{2}=\frac{\sqrt{3} }{4} 0.64a^{2}$

Now, comparing areas:

$\frac{A_{1}}{A_{2}}= (\frac{\sqrt{3}.1.44a^{2} }{4})(\frac{4}{\sqrt{3}.0.64a^{2} } )$

$\frac{A_{1}}{A_{2}} =$ 2.25

The area of ΔABC is 2.25x greater than the area of ΔDEF.

7 0

2 years ago