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3 years ago

Khan academy circles unit test

Mathematics

1 answer:

shutvik [7]3 years ago

3 0

What are you trying to say with that?

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Anthony's middle school has 356 students and 38 teachers. Stacy's middle school has 219 students and 28 teachers. Which middle s

anzhelika [568]

Answer:

Stacy's middle school

Step-by-step explanation:

356 divided by 38 = 9

219 divided by 28 = 7

6 0

3 years ago

Whats the answer to this?

mars1129 [50]

Answer:

15 degrees

X is an Acute Angle

Step-by-step explanation:

x+ 75 = 90

x =15

4 0

3 years ago

I don’t understand?????????????

Aliun [14]

Answer:

the numbers in parentheses are the values of X it wants you to plug in.

Step-by-step explanation:

for example: f(-6) = (-6)² - 3

f(2t) = (2t)² -3

7 0

3 years ago

What is the equation for a circle given its center is at (4, -1) and its radius is 5? 1(x - 4)2 + (y + 1)2 = 25 2(x + 4)2 + (y -

umka2103 [35]

Answer:

(x - 4)² + (y + 1)² = 25

Step-by-step explanation:

Circle Formula: (x - h)² + (y - k)² = r²

We are given <em>r</em>, and <em>(h, k)</em>, so simply plug them into the formula to get your answer.

4 0

4 years ago

Need help please can you give answer with working out i can not answer as it is quite gard

Elis [28]

Step-by-step explanation:

$\text{Given:}\\\\AB=3x-4\\AC=2x+12\\BC=7x-2\\AB:AC=1:2\Rightarrow(3x-4):(2x+12)=1:2\\\\\dfrac{3x-4}{2x+12}=\dfrac{1}{2}\qquad\text{cross multiply}\\\\(3x-4)(2)=(2x+12)(1)\qquad\text{use the distributive property}\\\\(3x)(2)+(-4)(2)=2x+12\\\\6x-8=2x+12\qquad\text{add 8 to both sides}\\\\6x-8+8=2x+12+8\\\\6x=2x+20\qquad\text{subtract}\ 2x\ \text{from both sides}\\\\6x-2x=2x-2x+20\\\\4x=20\qquad\text{divide both sides by 4}\\\\\dfrac{4x}{4}=\dfrac{20}{4}\\\\x=5$

$\text{Put the value of}\ x\ \text{to}\ AC\ \text{and}\ BC:\\\\AC=2(5)+12=10+12=22\\\\BC=7(5)-2=35-2=33\\\\AC:BC=22:33=\dfrac{22}{33}=\dfrac{22:11}{33:11}=\dfrac{2}{3}=2:3$

4 0

3 years ago