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Vika [28.1K]
3 years ago
11

Find value of each variable.

Mathematics
1 answer:
Lilit [14]3 years ago
8 0
6x+8x+40=180
14x = 140
   x = 10

7y + 3y - 10 = 180
10y = 190
    y = 19
You might be interested in
Solve for x. 2 ( x + 1 ) = 12
Evgen [1.6K]

2 ( x + 1 ) = 12

Use distributive property:

2x + 2 = 12

Subtract 2 from both sides:

2x = 10

Divide both sides by 2:

X = 5

5 0
3 years ago
Read 2 more answers
Evaluate if x = 2.<br> 9x + 13<br> A) 5 <br> B) 18 <br> C) 24 <br> D) 31
Natasha2012 [34]
<span> if x = 2
9x + 13 = 9*2 + 13 = 18 + 13 = 31

</span><span>D) 31</span>
3 0
3 years ago
If h and j are positive, (h+j)2 = 73 and h2 +j2 = 51, what is hj?
kkurt [141]

Answer:

hj = 11

Step-by-step explanation:

  • (h+j)^2=73,\:\: and\:\: h^2+j^2 =51 (Given)

  • (h+j)^2 = h^2+j^2 +2hj

  • \implies 73= 51 +2hj

  • \implies 73- 51 =2hj

  • \implies 22 =2hj

  • \implies hj = \frac{22}{2}

  • \implies hj = 11
3 0
2 years ago
The temperature, in degrees fahrenheit (°
vova2212 [387]
The temperature decreased by 5 degrees per hour, as -25 / 5 is -5.
5 0
3 years ago
Find the exact value of cos(arcsin(1/4)). For full credit, explain your reasoning.
Westkost [7]
First way
arcsin(1/4) means that 1/4 sin of the angle.

sin(α)=1/4
sin²α+cos²α=1
(1/4)²+cos²α=1
cos²α=1-1/16 =15/16
cosα=+/-(√15)/4

<span>Second way
</span>
sin(α)=1/4 =opposite leg/hipotenuse
cos(α)=adjacent leg/hypothenuse
adjacent leg =√(hypotenuse²- Opposite²)=√(16-1)=√15
cosα=+/-√15/4

For one value of sinα, possible 2 values of cosα.

5 0
3 years ago
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