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1 year ago

PLEASE HELP URGENT I will give brainiest

Mathematics

1 answer:

almond37 [142]1 year ago

8 0

Answer: I’ll edit this when I get the photo.

Step-by-step explanation:

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Solve using elimination 2x-y=-22 and -7x+y=67 <br> (9,4)<br> (-9,-4)<br> (-4,9)<br> (-9,4)

suter [353]

Answer: (-9,4)

Step-by-step explanation:

2x-y=-22

-7x+y=67

-5x=45

x=-9

2(-9)-y=-22

-18-y=-22

-y=-4

y=4

8 0

2 years ago

The sum of two consecutive odd integers is -124. Find two integers

SVETLANKA909090 [29]

$2n+1+2n+3=-124\\
4n+4=-124\\
4n=-128\\
n=-32\\\\
2n+1=-63\\
2n+3=-61$

5 0

3 years ago

Hellllllllllllllllllllllllpppppppppppppppppppppppp

Marizza181 [45]

Answer:

A) 200 students

B) 24

C) 46%

D) 46% are driven by car

Step-by-step explanation:

5 0

2 years ago

Student Debt – Vermont: The average student loan debt of a U.S. college student at the end of 4 years of college is estimated to

mezya [45]

Answer:

The confidence interval is (24116.3878,24883.6122).

Step-by-step explanation:

We are given the following information in the question:

Population mean, $\mu$ = $23,500

Sample mean, $\bar{x}$ = $24,500

Sample standard deviation,s = $2,800

Sample size, n = 146

Confidence interval:

$\bar{x} \pm t_{critical}\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at}~\alpha_{0.05} = \pm 1.655436$

$24500 \pm 1.65543(\frac{2800}{\sqrt{146}} ) = 24500 \pm 383.6122 = (24116.3878,24883.6122)$

The confidence interval is (24116.3878,24883.6122).

5 0

2 years ago

A cell phone company has a basic plan of $40 plus $0.45 for any minutes over 700. Before receiving his statement, John saw he wa

Darya [45]

Answer:

$718\ min$

Step-by-step explanation:

Let

x ----> the number of minutes

y ----> the total charge in dollars

we know that

For x>700 min

$y=0.45x+40$

For y=48.10

substitute

$48.10=0.45x+40$

Multiply by 100 both sides

$4,810=45x+4,000$ ----> equation without decimals

solve for x

$45x=4,810-4,000\\45x=810\\x=18\ min$

To find out the total minutes we need to sum

$18\ min+700\ min=718\ min$

7 0

3 years ago