3 years ago

Help me I really dont understand this is a free 20 points

Mathematics

2 answers:

Andreyy893 years ago

8 0

Answer:

Step-by-step explanation:

kherson [118]3 years ago

3 0

Answer: its b

Step-by-step explanation:

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2( 10 - a^2 ) + 7a If ( a = 4 )Evaluate each expression

Lostsunrise [7]

Solution:

Given:

$2(10-a^2)+7a$

when a = 4, substitute for a in the expression;

$\begin{gathered} 2(10-a^2)+7a=2(10-4^2)+7(4) \\ =2(10-16)+28 \\ =2(-6)+28 \\ =-12+28 \\ =16 \end{gathered}$

Therefore, if (a = 4), then

$2(10-a^2)+7a=16$

Hence, the answer is 16.

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Leno4ka [110]

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3 years ago

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3 years ago

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Find the value of x and the measure of the missing angle labeled A:

Nostrana [21]

Answer:

x = -2

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Step-by-step explanation:

x + 37 + x + 57 = 90

reduce:

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3 years ago

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igor_vitrenko [27]

Answer:

x=8

Step-by-step explanation:

4+4=x

4+4=8

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3 years ago