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3 years ago

If angle ABC is congruent to angle CBD, find x. A. 75 B. 225 C. 35 D. 25

Mathematics

1 answer:

liberstina [14]3 years ago

4 0

<span>angle ABC is congruent to angle CBD
so
ABC = CBD
3x = 75
x = 75/3
x=25
answer is </span><span>D. 25</span>

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35 POINTS. I need help! Please!

topjm [15]

There is no solution for the first one

if you eliminate y you get 2 equations
-13x - 13z = -25
-13x - 13x = -15

- there is no solution to theses

a23 means the element in the second row and the 3rd column

so its -5

7 0

3 years ago

Please help!!!!!!!!!!!!!!!!!!!!!

sleet_krkn [62]

It would be c I think

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3 years ago

Which equation can be simplified to find the inverse of y = 5x2 + 10?

zmey [24]

f^-1(x) = sq.rt 5(x - 10)/5, sq.rt 5(x - 10)/5 is the inverse of y = 5x^2 +10

Step-by-step explanation:

interchanging the variables

x = 5y^2 + 10

5y^2 +10 = x

5y^2 = x - 10

dividing by 5

5y^2/5 = x/5 + -10/5

y^2 = x/5 + - 10/5

y^2 = x/5 - 2

y = 5 (x-10) 0/5 (sq.rt)

g(5x^2 + 10) = 5x/5

g(5x^2 + 10) = x

f^-1(x) = sq.rt 5(x - 10)/5, sq.rt 5(x - 10)/5 is the inverse of y = 5x^2 +10

5 0

3 years ago

Read 2 more answers

At the toy store, 3 toy cars cost $2.61. How much does it cost to buy 15 toy cars?

Masteriza [31]

Use a ratio $\frac{3}{2.61}= \frac{15}{x}$ . 13.05 dollars.

7 0

3 years ago

Read 2 more answers

Can you help me with this question I rlly need it rn and please use the options it gives you thank you<3

Jet001 [13]

Answer: Choice C

Closed filled in circle at -3; shading to the right.

========================================================

Explanation:

Follow the steps shown below to isolate x. Note that the inequality sign flips when we divide both sides by a negative number.

$-4x+8 \le 20\\\\-4x \le 20-8\\\\-4x \le 12\\\\x \ge 12/(-4)\\\\x \ge -3\\\\$

Here's another way to isolate x

$-4x+8 \le 20\\\\8 \le 20+4x\\\\4x+20 \ge 8\\\\4x \ge 8-20\\\\4x \ge -12\\\\x \ge -12/4\\\\x \ge -3\\\\$

The inequality sign flip happens much earlier when we go from the format of $A \le B$ to $B \ge A$ (in step 3)

The graph of this will have a closed filled in circle at -3, then shading to the right to describe all values -3 or larger.

This is why we go for choice C.

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2 years ago