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krek1111 [17]
3 years ago
9

Solve for x. A. x = 12 B. x = 72 C. x=64 D. x=18

Mathematics
2 answers:
TiliK225 [7]3 years ago
6 0
Hi there! The answer is A. x = 12

The angles (taken together) are complementary angles: the sum of the angles is 90 degrees. When we know this, we can set up and solve an equation.

(3x + 6) + 48 = 90
Work out the parenthesis

3x + 6 + 48 = 90
Collect terms

3x + 54 = 90
Subtract  54

3x = 36
Divide by 3

x = 36 / 3 = 12
Therefore, the solution for x, gives x = 12. A is the correct answer.
natka813 [3]3 years ago
3 0
Hello there, and thank you for posting your question here on brainly.

Short answer: A. x = 12

Why?

This type of angle is called a complementary angle, where two acute angles add up to a 90° angle, (a right angle). Substitute x for 12 in the equation shown. (3 * 12 + 6) Now, do the appropriate math to solve. (3 * 12 = 36) Add. (36 + 6 = 42) To check if this is right, we have to add by the known angle, (48), and make sure it adds up to 90. (42 + 48 = 90) x = 12

Hope this helped you! ♥
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Step by step explanation:

y = x^2 +4~~~~~~~~~...(i)\\\\y = 2x +4~~~~~~~~~...(ii)\\\\\text{From (i) and (ii):}\\\\~~~~~~x^2 +4 = 2x+4\\\\\implies x^2 = 2x\\\\\implies x^2 -2x = 0\\\\\implies x(x-2) = 0\\\\\implies x =0,~ x = 2

\text{Substitute x = 0 in eq (i):}\\\\y = 0^2 +4 = 4\\\\\text{Substitute x = 2 in eq (i):}\\\\y=2^2+4 = 4+4 = 8\\\\\text{Hence,}~ (x,y)= \{(2,8), (0,4)\}

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I got you, bro

Answer:

(x+4)(x+18)

Explanation

Let's factor x2+22x+72

x2+22x+72

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Factoring means we want something like

(x+_)(x+_)

Which numbers go in the blanks?

We need two numbers that...

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Can you think of the two numbers?

Try 4 and 18:

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Fill in the blanks in

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Answer:

(x+4)(x+18)

4 0
1 year ago
Read 2 more answers
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