2 years ago

Please answer fast! I have only like 15 minutes. :(

Mathematics

1 answer:

Sphinxa [80]2 years ago

7 0

Answer:

A is the correct answer. hope this helps you

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Use mental math to simplify the expression. (5 + 23) + 65

ohaa [14]

1. (5+23)+65 = (5+65)+23 = 70+23 = 93 (D)
2. -(4x-7) = -4X+7 (C)
3. 2(6X+9) = 12X+18 (B)
4. 5(X-3) = 35
X-3 = 35/5
X-3 = 7
SO X= 7+3 = 10

THEN NO
9 IS NOT A SOLUTION

8 0

2 years ago

p varies jointly as q and the square of r, and p = 200 when q = 2 and r = 3. Find p when q = 5 and r= 2.

Margarita [4]

Step-by-step explanation:

If a variables varies jointly, we can just divide it by the other variables in relation to it.

For example, since p variables jointly as q and square of r, then

$\frac{p}{q {r}^{2} } = k$

where k is a constant

First, let find k. Substitute p= 200

q= 2, and r=3.

$\frac{200}{2(3) {}^{2} } = k$

$\frac{200}{18} = k$

$\frac{100}{9} = k$

Now, since we know our constant, let find p.

$\frac{p}{q {r}^{2} } = \frac{100}{9}$

Q is 5, and r is 2.

$\frac{p}{5( {2}^{2}) } = \frac{100}{9}$

$\frac{p}{20} = \frac{100}{9}$

$p = \frac{2000}{9}$

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1 year ago

What is 39% of 200? i already know it’s 78, i just need a explanation of how i got it.

spayn [35]

Answer:

200 x .39

Step-by-step explanation:

200 x .39= 78

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2 years ago

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26. Multiple Representations The tableDad's AgeCindy's Ageshows the ages of Cindy and her dad.2 years old28 years olda. Write an

madam [21]

A. is D=C+26

B is no

C. is because in each age difference, it is a 26 year age difference. SO you would add 26 to 18, which would give you 44 year old.

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2 years ago

Simplify 3(2x-2)-2(x-2) A.3x-3 B.3x-4 C.4x-2 D.4x-4

Black_prince [1.1K]

The answer is c 4x-2

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2 years ago

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