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drek231 [11]
3 years ago
12

Emily is adding 51 and 29 which steps can she use to add the numbers

Mathematics
1 answer:
frutty [35]3 years ago
7 0

Answer:

51 + 29+ 80

Step-by-step explanation:

she got this by adding 51 + 29

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How much work is done lifting a 5 kg ball from a height of 2 m to a height of 6 m? (Use 10 m/s for the acceleration
Sedbober [7]
<h2>Explanation:</h2>

In physics, work is defined force that causes displacement. So this can be expressed by the following equation:

W=Fs

Where:

F:Force \\ \\ s:Displacement

The force can be found as:

F=ma \\ \\ F=5(10)=50N

And for the displacement:

s=6-2=4m

The force (weight) is down and the displacement is up, then the work must be negative. So:

W=-(50)(4) \\ \\ \boxed{W=-200J}

8 0
3 years ago
Which ordered pair could replace the missing value and create a
Usimov [2.4K]

Answer:

C

Step-by-step explanation:

The same x value cannot be used more than once or it isn't a function.

8 0
3 years ago
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There are 442 boy students in class
poizon [28]

Answer:

520

Step-by-step explanation:

This problem is

boys + girls = total

Boys = 442

Girls = 15% of the total

Therefore, substituting in, gives us:

442 + .15t = t, where t is total

Then 442 = .85t and

t = 520

5 0
3 years ago
A softball has a diameter of 3.82 inches. How many square inches of material is necessary to cover a softball? Use 3.14 for π
lisabon 2012 [21]

Answer:

45.82 square inches

Step-by-step explanation:

Use the formula for the surface area of a sphere, A = 4\pir²

If the diameter is 3.82 inches, the radius is 1.91 inches.

Plug in 3.14 as \pi and 1.91 as r, and solve:

A = 4\pir²

A = 4(3.14)(1.91²)

A = 45.82

So, approximately 45.82 square inches of material are needed.

6 0
3 years ago
What are the zeros of f(x)=x^2+x-20?
zzz [600]
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Answer: C. x = -5 and x = 4.
3 0
3 years ago
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