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krok68 [10]
3 years ago
7

What is the value of y in the solution to the system of equations?

Mathematics
1 answer:
AnnZ [28]3 years ago
7 0

Answer:

The correct answer is D. 8

Step-by-step explanation:

In order to find this, solve by multiplying the top equation by -6. Then add the equations together to get the x values to cancel. Then you may solve for y.

-2x - 3/2y = -6

2x - 3y = -30

--------------------

9/2y = -36

y = 8

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What are all the variables of x y and z ?
Anettt [7]

Answer:

x°=96°

y°=88°

z°=151°

Step-by-step explanation:

55°+29°+×°=180°

×°=96°

96°+55°=z°

z°=151

then let variable A° be one of the inner angle of the triangle

A°+z°=180°

A°+151°=180°

A°=29°

finally adding all the inner angles will give us 180°

96°+y°-13°+29=180°

y°=88°

3 0
3 years ago
Help pleaseee, I’ll give brainly!
Gnesinka [82]

Answer:

1) 6r+7=13+7r —> 7r–6r=7–13 —> r = – 6

2) 13–4x=1–x —> 4x–x=13–1 —> 3x=12 —> x=12/3 —> x=4

3)–7x–3x+2=–8x–8 —> –8x+7x+3x=2+8 —> 2x=10 –> x= 10/2 –> x= 5

4)–8–x=x–4x —> –x–x+4x=8 —> 2X=8 —> x= 8/2 —> x= 4

5) –14+6b+7-2b=1+5b —> 5b +2b –6b = –14+7–1 —> b=–8

6) n+2=–14–n —> n+n=–14–2 —> 2n = –16 —> n = – 16/ 2 —> n = – 8

7) n – 3n = 14 –4n —> n –3n + 4n = 14 —> 2n = 14 —> n = 14/ 2 —> n = 7

8) 7a – 3 = 3 + 6a —> 7a – 6a = 3 + 3 —> a = 6

9) 3(1–3x ) =2(–4x+7) —> 3 –9x = –8x+14 —> 9x–8x = 3–14 —> x = –11

10) –10 +x+4–5 =7x –5 —> 7x–x = –10+4–5 +5 —> 6x = –6 —> x= –6/6 —> x = –1

11) –8n +4(1+5n)=–6n–14 —> –8n +4 + 20n = – 6n– 14

20n –8n +6n= –14 –4 —> 18n = – 18 —> n = –18/18 —> n = –1

12) –6n–20=–2n +4(1–3n) —> –6n –20 = – 2n +4 –12n —> 12n +2n –6n = 4 +20 —> 8n =24 —> n = 24/8 —> n =3

I hope I helped you^_^

3 0
3 years ago
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An item priced at $10.20 has a sales tax of $0.41.Find the sales tax rate expressed as a percent.
torisob [31]
0.41 / 10.20 = 0.040.....multiply by 100 to get ur percent = 4%
3 0
3 years ago
Luke buys $14.35 worth of gasoline for his car. If the gas station $1.409 per gallon, how many gallons did he get? Round to the
iragen [17]

Answer:

10.2 gallons

Step-by-step explanation:

Luke buys $14.35 worth of gasoline for his car

The gas station sells at $1.409 per liter

Therefore the number of gallons that luke buys can be calculated as follows

= 14.35/1.409

= 10.2 gallons

4 0
3 years ago
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Help need pls anewer 1-4​
Art [367]

Answer:

1. width is w. length is w + 26

2.

w \times (w  + 26)   < 2040

3. the width must be less than 34

4. sure, if the width is 10, then the area is 360

Step-by-step explanation:

w \times (w  + 26)   < 2040

1

7 0
2 years ago
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