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bazaltina [42]
1 year ago
7

Need help (pic included)

Mathematics
1 answer:
ValentinkaMS [17]1 year ago
4 0

Answer:

(-4,-2)

x=-4

y=-2

Step-by-step explanation:

-3x-4y=20

3(x-10y=16)=3x-30y=48

The reason I multiplied 3 to the second equation is for when we add the equations together the x will cancel out.

  -3x-4y=20

+  <u>3x-30y=48</u>

  -34y=68

Divide -34 from both sides.

y=-2

To find x you need to plug in -2 for y into one of the equations.

x-10y=16

x-10(-2)=16

Remember a negative times a negative equals a positive.

x+20=16

Subtract 20 from both sides.

x=-4

Hope this helps!

If not, I am sorry.

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Find the missing angle<br> measures marked with<br> question marks.
slavikrds [6]

Answer:

First one- The ? across from 70 degrees is 70 degrees, and the ones on the side are both 110 degrees.

The second one- The one across 53 degrees is 53 degrees and the ones are the side are both 127 degrees.

Step-by-step explanation:

Take the shown angle and subract that by 180 degrees to get your answer for the missing angles. And the one across from the shown angle is the same number.

Hope this helped im not sure if its right though.

6 0
3 years ago
The net of a triangular prism is show below.Find the rotal surface area of the triangular prism 4.6,4,5,15
marysya [2.9K]

Answer:

228.4cm²

Step-by-step explanation:

Find the diagram attached

Total surface area of the prism = Ph + 2B

P is the perimeter of the base (triangle)

h is the height of the prism

B is Base area

P = 5cm + 5cm + 4cm

P = 14cm

h = 15cm

B = 1/2 * base * height

B  = 1/2 * 4.6 * 4

B = 4.6 * 2

B = 9.2cm²

Substitute the values into the formula;

Total surface area of the prism = Ph + 2B

Total surface area of the prism = 14(15)+2(9.2)

Total surface area of the prism = 210 + 18.4

Total surface area of the prism = 228.4cm²

Hence the total surface area of the triangular prism is 228.4cm²

7 0
3 years ago
What is the coefficient of y in 2-5y÷2​
Setler [38]

Answer:

-5/2 because there is -5y/2 but we have to take coefficient only so -5/2

5 0
3 years ago
How do you solve 30 and 31
Westkost [7]

Answer:

(#30) 1.12 miles

Step-by-step explanation:

9.7x.75=7.27

r=7.27

8.2x.75=6.15

e=6.15

7.27-6.15=1.12

1.12 miles

8 0
3 years ago
The table shows the monthly rainfall at a measuring station. What is the mean monthly rainfall? Round your answer to the nearest
Artyom0805 [142]

Answer:

3.245

Step-by-step explanation:

2.22+1.51+1.86+2.06+3.48+4.57+3.27+5.40+5.45+4.34+2.64+2.14 then divide by twelve because that is the number of months :))))

8 0
2 years ago
Read 2 more answers
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