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4 years ago

14

ΔABC has vertices A(0,10), B(4,10), and C(-2,4).

1 answer:

laiz [17]4 years ago

8 0

A simple diagram will show you the intersection of altitudes is in the 2nd quadrant. It must have x-coordinate -2, as the altitude to the "base" y=10 must be the vertical line through (-2, 4).

The appropriate choice is ...

... C: (-2, 12)

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The 8th and 20th terms of an arithmetic sequence are 20 and 56 respectively. What is the 1st term of the sequence.

Ostrovityanka [42]

Answer:

<h3> a₁ = -1</h3>

Step-by-step explanation:

$a_n=a_1+d(n-1)\\\\a_8=a_1+d\cdot7\\\\a_{20}=a_1+d\cdot19\\\\a_{20}-a_8=a_1+19d-(a_1+7d)=12d\\\\56-20=2d\\\\12d=36\\\\d=3\\\\\\ a_1+3\cdot7=20\\\\a_1=20-21=-1$

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3 years ago

a die rolled. the set of equally likely outcomes is 1 ,2, 3, 4, 5, 6. find the probability of getting a 10.

Sidana [21]

Answer:

1 in 12

Step-by-step explanation:

hard to explain

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3 years ago

What is the measure of the vertex angle of an isosceles

pshichka [43]

Answer:

A) 96

Step-by-step explanation:

The 2 base angles are both 42* thus adding up to 84*. 180-84=96

You are welcome.

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3 years ago

Meredith is saving up to buy a digital camera that costs $490. So far, she saved $175. She would like to buy the camera 4 weeks

MatroZZZ [7]

She would have to get 78.75 dollars every week to get the camera.

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3 years ago

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How do you convert repeating decimals to fractions

irga5000 [103]

Answer:

the answer is 30/99, which simplifys to 10/33

Step-by-step explanation:

Hope this helps. You always change the denomiter to 99 for repeating decimal. Good luck

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3 years ago

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