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2 years ago

At the market, 5 light bulbs cost $9. How much do 7 light bulbs cost?

Mathematics

2 answers:

Naddik [55]2 years ago

8 0

Answer:

$\boxed{$12.60}$ $\boxed{12.60}$

Step-by-step explanation:

Hey there!

 Given 

5 light bulbs = $9

__________________________________________________________

9 ÷ 5 = 1.8

Each light bulb is 1.8

To check do 1.8 • 5 = 9

Now we have cost per light bulb, do

7 • 1.8

= $12.6 for 7 light bulbs

Hope this helps :)

lidiya [134]2 years ago

3 0

Answer:

$12.60

Step-by-step explanation:

find unit price first

9÷5

1.8×7

12.6

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2 years ago

A liquid at temperature 7575F is placed in an oven at temperature 450450. The temperature of the liquid increases at a rate 77 t

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Step-by-step explanation:

Given

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$\Delta T=450-75\\\Rightarrow \Delta T=375^{\circ}F$

According to the question

$\Rightarrow \dfrac{dT(t)}{dt}=77\cdot \Delta T\\\\\Rightarrow \dfrac{dT(t)}{dt}=77\times (450-T)\quad [\text{T=75}^{\circ}F\ \text{at t=0}]$

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2 years ago

Find the area of the parallaogram to the nearest tenth

GuDViN [60]

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sorry I think yr question is incomplete.

u forget to add picture.

<h3>stay safe healthy and happy.</h3>

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3 years ago

Select the undefined term that best defines the arrow pictured point line plane

MArishka [77]

The answer is B. Line.

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3 years ago

Read 2 more answers

What is the volume of a square pyramid if the perimeter of the base is 44 in and the height is 19 in.? Round to the nearest tent

Verdich [7]

Answer:

766.3 square inches

Step-by-step explanation:

The volume of pyramid is given by

volume = 1/3(area of base) * height of pyramid

Given shape of base is square and

Perimeter of that square is 44inches

We know that perimeter for square is given by 4* length of side

Thus,

44 inches = 4* length of side

 Length of side = 44/4 = 11 inches

_____________________________________________

Area of square is given by side*side.

Thus, area of square base of pyramid is = 11*11 inches square = 121 inches square

Now that we have area of base and height of pyramid .

Substituting these value in formula for volume of pyramid we have

volume = 1/3(area of base) * height of pyramid

 volume = 1/3*(121) * 19 = 2,299

 volume = 766.33

Volume of square pyramid rounded to nearest tenth is 766.3 square inches

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3 years ago