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Morgarella [4.7K]
3 years ago
15

X = 7 - 2y 2x + y = 5

Mathematics
1 answer:
butalik [34]3 years ago
3 0
Do substitution
2(7-2y) = 5
14 - 4y = 5
-4y = -9, y = 9/4
2x + 9/4 = 5
8x + 9 = 20
8x = 11, x = 11/8
Final answer: x = 11/8, y = 9/4
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Ilya [14]
Radius = Diameter ÷ 2 = 10 ÷ 2 = 5mm
<u>
Find Volume: </u>

Volume= πr²h

Volume = π (5)² (6) = 471.24mm³ (Nearest hundredth)


<u>Find Surface Area:</u>

Surface area = 2πr² + 2πrh 

Surface area = 2π(5)² + 2π(5)(6) = 345.58 mm²

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3 years ago
The college Physical Education Department offered an Advanced First Aid course last summer. The scores on the comprehensive fina
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Answer:

a) Robert, Juan, linda

b) Joel

c) Susan, Jan

d)    165.4

       173.4

       134.5

       156

       147.3  

       170.2

       

Step-by-step explanation:

The standardized normal distribution  N (0,1)  that expresion stands for normal distribution with mean 0 and standard deviation 1, therefore all positive values are above 0 and all negativa values are below 0

The sample n is 6 then we should use t-student distribution, we calculate t statistic as follow

t = (x-μ)/εε        where standard error is   εε = σ/√6      εε = 9.795  since         σ =24

Robert

0.96 * 9.795  = x - 156                 ⇒     x = 165.4

1.78 * 9.795  = x  - 156                          x = 173.4

-2.2 * 9.795   = x - 156                          x = 134.5

0 * 9.795        = x- 156                          x= 156

-0.89* 9.795   = x -156                          x = 147.3

1.45 * 0.9795  = x -156                         x = 170.2

7 0
4 years ago
Solve for v.<br> 5(v+2) = -2(7v-3) +9v<br> Simplify your answer as much as possible
Andreas93 [3]

5(v+2) = -2(7v-3) + 9

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

Distribute:

5v + 10 = -14v + 6 + 9

Combine Like Terms

5v + 10 = (-14v+9v)+6

5v + 10 = -5v + 6

Subtract -5v from both sides

10v + 10 = 6

Subtract 10 from both sides

10v = -4

Reduce

5v = -2

Divide both sides by 5

v = -2/5

Simplify

v = -0.2

3 0
4 years ago
Read 2 more answers
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Deffense [45]

Answer:

i think the answer is 7/4

6 0
3 years ago
Can you guys help me with number 9 please !!
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The correct answer is B
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