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Usimov [2.4K]
3 years ago
10

Can someone tell me this?): thank u

Mathematics
1 answer:
pochemuha3 years ago
4 0

Answer:x=6

Step-by-step explanation:

YZ is 1/2 of EF, so the same goes for the other sides. ED is 10, so XY is 5, 5=x-1, solve for x, and you get x=6. And to verify, XY is 7.5, so DF would be double that, so 15=3(x-1), which is correct 15=3(6-1)=3(5)

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A total of 50 juniors and seniors were given a mathematics test. The 35 juniors attained an average score of 80 while the 15 sen
Alik [6]

Answer:

77

Step-by-step explanation:

Firstly, we need to calculate the total score of the junior students and the total score of the senior students.

The total score of the junior students is 35 * 80 = 2,800

The total score of the senior students is 15 * 70 = 1050

The total score is thus 2,800 + 1,050 = 3,850

The average score of the 50 students is thus 3,850/50 which equals 77

8 0
3 years ago
18-23(if you want) I don’t understand what do, please help!
Tamiku [17]

Answer:

-22

Step-by-step explanation:

1.Factor out the negative sign.

2.Calculate (add for question 18)

3. Add the negative sign back.

Hope this helps :)

3 0
2 years ago
Read 2 more answers
Solve for x, angle A, and Angle B<br> A x+50 B x+80 c72
jolli1 [7]
I’m assuming you man degrees? Are these angles of a triangle?

This doesn’t really make sense because the angles in a triangle add up to 180° so your equation would be x+50+x+80+72=180

Combine like terms to get
2x+202=180

Then subtract 202 from both sides
2x=-22

So x would be -11 which doesn’t seem right lol
7 0
3 years ago
Read 2 more answers
Evaluate the expression when z= -12<br> 1/2z^2
icang [17]

Answer:

Exact Form: z = 0, -2/25

Decimal Form: 0, -0.08

Step-by-step explanation:

I used cymath.com. I highly recommend it. It shows you the steps to the problem you want to solve!

I hope this helps! :)

The last step is to solve for z

8 0
2 years ago
Plz help, its worth 200 points by today
Leno4ka [110]

Answer:

X = \sqrt{39}

Step-by-step explanation:

1)\ X^2 + 5^2 = Y^2\ (Y\ is\ the\ hypotenuse\ of\ the\ smaller\ triangle)

2)\ Y^2 + 6^2 = 10^2

3)\ X^2 + 25 + 36 = 100

4)\ X^2 = 39

5)\ X = \sqrt{39}

3 0
3 years ago
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