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lianna [129]
2 years ago
12

-3-5x-5y+8x+7y+8 PLEASE ANSWE ASAP

Mathematics
2 answers:
Strike441 [17]2 years ago
7 0

Answer:

3x+2y+11

Step-by-step explanation:

I hope this helps

your welcome

erastova [34]2 years ago
7 0

Answer:

3x + 2y + 5

Step-by-step explanation:

-3 - 5x - 5y + 8x + 7y + 8

(first, let's group the like terms)

= - 5x + 8x - 5y + 7y - 3 + 8

(now, add the numbers that do not have a variable,  - 3 + 8)

=  - 5x + 8x - 5y + 7y + 5

(add the elements you think are alike)

= 3x + 2y + 5

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What is the measurement of each side of the perimeter is 94?
sveticcg [70]
2a+1 + 3a+2 +5a-9 you would start by combining like terms
2a+3a+5a= 10a
1+2-9= -6
10a-6=94
then subtract 94-6=88
then divide 88 by 10= 8.8
a=8.8
8 0
3 years ago
The sum of three consecutive odd integers is − 87 . find the numbers.
DIA [1.3K]
Three consecutive odd integers are n, n+2 and n+4

n + n+2 + n+4 = -87
3n + 6 = -87
3n = -87 - 6
3n = -93
n = -93/3
n = -31

n+2 = -31 + 2 = -29
n+4 = -31 + 4 = -27

The numbers are -31, -29 and -27
5 0
3 years ago
If x-1/x = 9 find the value of x +1/x
iren [92.7K]

Answer:

\sqrt{85}

Step-by-step explanation:

Given

x - \frac{1}{x} = 9 ← square both sides

(x - \frac{1}{x})² = 9²

x² - 2 + \frac{1}{x^2} = 81 ( add 2 to both sides )

x² + \frac{1}{x^2} = 83

Now

(x + \frac{1}{x})² = x² + \frac{1}{x^2} + 2, thus

x² + \frac{1}{x^2} = 83 + 2 = 85

(x + \frac{1}{x} )²= 85 ( take the square root of both sides)

x + \frac{1}{x} = \sqrt{85}

5 0
3 years ago
Automobile mechanics conduct diagnostic tests on 150 new cars of a particular make and model to determine the extent to which th
Aleks04 [339]

Answer:

99% Confidence interval: (0.185,0.375)                                                  

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 150

Number of cars that have faulty catalytic converters, x = 42

\hat{p} = \dfrac{x}{n} = \dfrac{42}{150} = 0.28

99% Confidence interval:

\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

z_{critical}\text{ at}~\alpha_{0.01} = \pm 2.58

Putting the values, we get:

0.28\pm 2.58(\sqrt{\frac{0.28(1-0.28)}{150}}) = 0.28\pm 0.095\\\\=(0.185,0.375)

The​ 99% confidence interval for the true proportion of new cars with faulty catalytic converters is​ (0.185,0.375)

8 0
3 years ago
Jacob and Shawna are selling shirts and hats for a
Nataliya [291]

answer:

$9 for a shirt

$5 for a hat

5 0
2 years ago
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