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Alekssandra [29.7K]
3 years ago
7

Pls answer this fast (30 points)Simplify the algebraic expression -2(x - 3) + 4(-2 x + 8)​

Mathematics
1 answer:
Anna11 [10]3 years ago
6 0

Answer:

-10x + 38.

Step-by-step explanation:

-2(x - 3) + 4(-2x + 8)​

= -2x + 6 - 8x + 32

= -10x + 38.

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Find the measure of Q, the smallest angle in the triangle whose sides have lengths 4-5, and 6. Round the measure to the nearest
kakasveta [241]

<u>Given</u>:

Given that PQR is a triangle.

The measures of the sides of the triangle are 4,5 and 6.

We need to determine the measure of ∠Q.

<u>Measure of ∠Q:</u>

The measure of ∠Q can be determined using the law of cosines formula.

Thus, we have;

\cos (Q)=\frac{p^{2}+r^{2}-q^{2}}{2 p r}

Substituting p = 6, q = 4, r = 5, we get;

\cos (Q)=\frac{6^{2}+5^{2}-4^{2}}{2 (6)(5)}

Simplifying, we get;

\cos (Q)=\frac{36+25-16}{2 (30)}

\cos (Q)=\frac{45}{60}

Dividing, we get;

\cos (Q)=0.75

      Q=cos^{-1}(0.75)

      Q=41^{\circ}

Thus, the measure of ∠Q is 41°

Hence, Option b is the correct answer.

4 0
3 years ago
Can someone answer this
MA_775_DIABLO [31]

Answer:

10 inches

Step-by-step explanation:

18*2=36

56-36=20

20/2= 10

The missing side length is 10 inches.

Hope this helps! Have a nice day :)

5 0
3 years ago
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What is the answer to this problem- <br> (a-3b+5)-(-a+2b+3)
tiny-mole [99]

Answer:

\displaystyle 2 - 5b + 2a

Step-by-step explanation:

To avoid confusion, distribute that negative amongst all terms in the second set of parentheses:

\displaystyle 2a - 5b + 2 = (a - 3b + 5) - (-a + 2b + 3)

** The above answer is written in reverse, which is the exact same result.

I am joyous to assist you anytime.

6 0
3 years ago
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OleMash [197]

Answer:

1/8

Step-by-step explanation:

1/2 cubed is just 1/2*1/2*1/2 which is 1/8

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3 years ago
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How much is 25 centimeters in meters
Olegator [25]
0.25 meter is the answer
5 0
4 years ago
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