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S_A_V [24]
3 years ago
15

Matthew is 7 years older then twice the age of his sister. If Matthew is 13, how old is his sister? (NOT SUBTRACTION,ITS MUCH MO

RE)
Mathematics
1 answer:
Nadusha1986 [10]3 years ago
4 0

S = sisters ages

M =2S +7

M=13

13 = 2S+7

subtract 7 from each side

6 = 2S

divide by 2

3=S

sisters age is 3


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Nikolay [14]

Answer:

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Step-by-step explanation:

3 0
3 years ago
which is the rationalized form of the expression the square root of x divided by the square root of x +the square root of 7
Ilya [14]

Answer:

I assume your goal is to rationalize the denominator -

So you need to multiply the denominator by its conjugate.

So we have:

\frac{\sqrt{x} }{\sqrt{x}-\sqrt{7} } *\frac{\sqrt{x} +\sqrt{7} }{\sqrt{x} +\sqrt{7}}

->

\frac{x-\sqrt{7}\sqrt{x} }{x-7}

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8 0
3 years ago
Quickly helllllpppp! plz
xz_007 [3.2K]

Answer:

≈ 8.07 mg

Step-by-step explanation:

Given

f(x) = 12(0.82)^{x}

Substitute x = 1 into f(x) , that is

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7 0
3 years ago
Find the measure of exterior 1.
svetlana [45]
The answer would be 90.
8 0
2 years ago
Read 2 more answers
Using what you know about angles and triangles, what is the measure of angle 6?
zvonat [6]
∠4 = 90  (verticallyopposite)
∠2 = 68 (verticallyopposite)

∠6 = ∠2 + ∠4 (exterior angles = sum of opposite angles)

∠6 = 68 + 90 = 158°

Answer: 158°
7 0
2 years ago
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