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Natali5045456 [20]
3 years ago
11

What is the answer to -13-(-15)

Mathematics
2 answers:
alexira [117]3 years ago
6 0
-13-(-15) is 2  you make the 13 and the 15 positive and then subract. thats how you get 2                                          
iren [92.7K]3 years ago
4 0
-13-(-15)
=(-13)+15
=2
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The water pressure for a standard fire hydrant is 20 pounds per square inch. Convert this to
Kaylis [27]
<h3>Answer:    2880 pounds per square foot</h3>

==========================================================

Explanation:

psi = pounds per square inch

1 foot = 12 inches

1 square foot = 144 square inches

I squared both sides to get the second equation. Think of a 12 by 12 square representing 12 inches along each side, so that leads to 12*12 = 144 square inches being the same as 1 square foot.

That last equation helps us convert from square inches to square feet like so:

20 \text{ psi} = \frac{20 \text{ pounds}}{1 \text{ square inch}}\\\\20 \text{ psi} = \frac{20 \text{ pounds}}{1 \text{ square inch}}*\frac{144 \text{ square inches}}{1 \text{ square foot}}\\\\20 \text{ psi} = \frac{20*144}{1*1}*\frac{\text{ pounds}}{\text{ square foot}}\\\\20 \text{ psi} = \frac{2880 \text{ pounds}}{1 \text{ square foot}}\\\\20 \text{ psi} = 2880 \frac{\text{ pounds}}{\text{ square foot}}\\\\20 \text{ psi} = 2880 \text{ pounds per square foot}\\\\

Notice in the jump from the second step to the third step, we have the "square inches" unit cancel out when dividing. All that's left is "pounds" up top and "square foot" down below.

In short, we simply multiply by 144 to go from 20 to 2880.

5 0
2 years ago
On Friday, Oscar sold 2 pitchers of lemon are from his lemonade stand. On Saturday, he sold 1/2 as much lemonade as on Friday. H
Ann [662]

Answer:

The correct answer is 1 pitcher.

Step-by-step explanation:

Oscar sold 2 pitchers of lemon are from his lemonade stand on Friday.

On Saturday, he sold \frac{1}{2} as much lemonade as on Friday.

The number of pitchers of lemon from the lemonade stand which Oscar sold on Saturday is given by \frac{1}{2} × 2 = 1 pitcher.

Thus Oscar sold 1 pitcher on Saturday which is half of the number of pitchers of lemon he could sell on Friday.

4 0
4 years ago
Please Help me with this exam question.
mel-nik [20]

Based on the function given, the domain of f(x) is -18 ≤ x ≤ 10 and the range is 16 ≤ f(x)  ≤ 95

<h3>What are the domain and range?</h3>

The domain of a function is found by looking at a graph from left to right. This means that x will be equal to or greater than the smallest x value and less than or equal to the largest x value.

Domain is therefore:

-18 ≤ x ≤ 10

The range can be found by looking at the y value. The value if f(x) will be equal to or greater than the smallest y value and less than or equal to the largest y value.

Range is:

16 ≤ f(x)  ≤ 95

Find out more on range and domain at brainly.com/question/25915612

#SPJ1

8 0
2 years ago
A solid figure with flat faces
Vaselesa [24]
A cube i hope i helped!
4 0
3 years ago
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Find the value of X answer in simplest form
Arlecino [84]

Answer:

14.14

Step-by-step explanation:

You can find the value of x using the trig ratio Sine = opposite/hypotenuse.

The sin 45 = 10/x. Solve for x.

x= 10/ sin45

x = 10/0.707

x = 14.14

5 0
3 years ago
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