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anastassius [24]
3 years ago
7

I NEED HELP!!!

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
6 0

Answer:

x= -2, y = -3

Step-by-step explanation:

1. substitute x = 4+2y in the first equation: \begin{bmatrix}2\left(4+2y\right)+y=-7\end{bmatrix}

simplify it : \begin{bmatrix}8+5y=-7\end{bmatrix}

2. isolate y in 8 + 5y = -7 --> 5y = -7 - 8 -->

3. solve for y:  5y = -15 --> y = -15/5 --> y= -3

4. solve for x: x = 4 + 2y

x = 4 + 2(-3)

x = 4 + (-6)

x = -2

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One of the legs of a right triangle measures 8 cm and its hypotenuse measures 14 cm.
Ugo [173]

Answer:

about 11.5 cm.

Step-by-step explanation:

I know the measurement of the other leg is about 11.5 cm. I know because I used the Pythagorean theorem.

a^2+b^2=c^2.

"a" and "b" are the values of the legs of the triangle, while "c" is the measure of the hypotenuse. We know that 8cm is the measure of one of the legs, and 14 cm is a measure of the hypotenuse.

8^2+b^2=14^2 simplified: 64+b^2=196

Then, I subtracted 64 on both sides, so I would have "b" by itself.

b^2=132

Next, I found the square root of both b^2 and 132, so I would find the true value of "b."

b=11.4891252931

So, the measure of the other leg rounded to the nearest tenth is about 11.5.

3 0
3 years ago
Alternate exterior angles ​
exis [7]

Answer:

When  \: two  \: lines  \: are \:  crossed \:  by  \: another \:  line \:  (called  \: the \:  Transversal \: ):  \: Alternate \:  Interior  \: Angles \:  are  \: a \:  pair  \: of  \: angles  \: on \:  the \:  inner  \: side  \: of  \: each  \: of \:  those  \\  \\  \\  \\  \\ two \:  lines  \: but  \: on \:  opposite  \: sides  \: of  \: the  \: transversal.

hope it helps if it helps don'tforget to like and mark

8 0
3 years ago
Solve for x. I need help with this problem. <br><br>​
Advocard [28]

Answer:

x = 9

Step-by-step explanation:

Rule: the two interior angles F and E when added, equal <FGH.

so

6x + 16 + 60 = 13x + 13  Combine the terms on the left.

6x + 76 = 13x + 13          Subtract 13 from both sides.

6x + 76-13 = 13x             Combine

6x + 63 = 13x                  Subtract 6x from both sides.

63 = 7x                            Divide by 7

63/7 = x

x = 9

7 0
3 years ago
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Ann [662]

Answer:

A

Step-by-step explanation:

It asks which material is the densest, the answers are lead, plastic, steel, or wood. Lead is the most dense. Plz mark brainliest

5 0
3 years ago
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3 0
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