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2 years ago

7

These angles are complementary. What is X?

2 answers:

Phantasy [73]2 years ago

5 0

Answer:

12

Step-by-step explanation:

do 4x+3x+6=90 combine like terms 7x+6=90 subtract 6 from both sides 7x=84

divide both sides by 7 x=12

Ann [662]2 years ago

4 0

Since the angles are complementary, and that is a right angle, it is equal to 90°. So, we know that 4x+3x+6=90.

So, solve this for x. Combine like terms. The problem should now look like: 7x+6=90. Now, we need to isolate the x. Subtract 6 from 6, and subtract 6 from 90. This is because we must move the 6 to the other side of the problem to find x. Whatever we do on one side of the problem, we must do on the other. The problem should now look like 7x=84. Now, isolate the variable by dividing 7x by 7. Again, you must do the same thing to both sides of the problem. So, you must also divide 84 by 7.

The answer is x=12.

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erica [24]

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2 years ago

Let h(x)=x^2+1<br> h(h(h(3)))<br><br> I got the answer 10202

pashok25 [27]

Answer: 10202

Step-by-step explanation:you are right! I’m pretty sure!

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2 years ago

8) Find the endpoint Cif M is the midpoint of segment CD and M (2, 4) and D (5,7)

Elenna [48]

Answer:

8. c. (-1, -1)

9. a. (-6, -1)

b. True

Step-by-step Explanation:

8. Given the midpoint M(2, 4), and one endpoint D(5, 7) of segment CD, the coordinate pair of the other endpoint C, can be calculated as follows:

let $D(5, 7) = (x_2, y_2)$

$C(?, ?) = (x_1, y_1)$

$M(2, 4) = (\frac{x_1 + 5}{2}, \frac{y_1 + 7}{2})$

Rewrite the equation to find the coordinates of C

$2 = \frac{x_1 + 5}{2}$ and $4 = \frac{y_1 + 7}{2}$

Solve for each:

$2 = \frac{x_1 + 5}{2}$

$2*2 = \frac{x_1 + 5}{2}*2$

$4 = x_1 + 5$

$4 - 5 = x_1 + 5 - 5$

$-1 = x_1$

$x_1 = -1$

$4 = \frac{y_1 + 7}{2}$

$4*2 = \frac{y_1 + 7}{2}*2$

$8 = y_1 + 7$

$8 - 7 = y_1 + 7 - 7$

$1 = y_1$

$y_1 = 1$

Coordinates of endpoint C is (-1, 1)

9. a.Given segment AB, with midpoint M(-4, -5), and endpoint A(-2, -9), find endpoint B as follows:

let $A(-2, -9) = (x_2, y_2)$

$B(?, ?) = (x_1, y_1)$

$M(-4, -5) = (\frac{x_1 + (-2)}{2}, \frac{y_1 + (-9)}{2})$

$-4 = \frac{x_1 - 2}{2}$ and $-5 = \frac{y_1 - 9}{2}$

Solve for each:

$-4 = \frac{x_1 - 2}{2}$

$-4*2 = \frac{x_1 - 2}{2}*2$

$-8 = x_1 - 2$

$-8 + 2 = x_1 - 2 + 2$

$-6 = x_1$

$x_1 = -6$

$-5 = \frac{y_1 - 9}{2}$

$-5*2 = \frac{y_1 - 9}{2}*2$

$-10 = y_1 - 9$

$-10 + 9 = y_1 - 9 + 9$

$-1 = y_1$

$y_1 = -1$

Coordinates of endpoint B is (-6, -1)

b. The midpoint of a segment, is the middle of the segment. It divides the segment into two equal parts. The answer is TRUE.

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PilotLPTM [1.2K]

Answer:

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Step-by-step explanation:

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