What is the solution of the following system

-2x-y=1

-4x-2y=-1

Answer:

6720

Step-by-step explanation:

you you are going to multiply 280 gallons and 24 hours to get 6720 I'm not 100% sure this is the correct answer

Answer:

1.3446069e+62

Step-by-step explanation:

Answer: 3.765

Step-by-step explanation:

Answer:

Chang sent 17 messages, Alonzo sent 51 and Raina sent 26.

Step-by-step explanation:

You turn the word problem into an algebraic expression and solve

Answer:

b=63

Step-by-step explanation:

2/9b=1/3b-7

sub 1/3 from each side

-1/9b=-7

them multiply both sides by -9/7

Answer:

I'd like to say half because it's being divided by 2

Step-by-step explanation:

I hope this helps

Answer:3(6+x)(6-x)

Step-by-step explanation:

Used a math app

Answer:

Yes, you will have enough ribbon

Step-by-step explanation:

16/4 divided by 1/8

32 people will get ribbon

Answer:

Yes you have enough

Step-by-step explanation:Multiply 1/4 times 2 that is 2/8, Already 2 people done.22 people are left and 4 whole yards of ribbon are left too, for every yard of ribbon you have right now its 8 people so , 4 times 8 is 32.So you have enough.

Answer:

1.49 x [tex]10^{5}[/tex] hours

Step-by-step explanation:

1 day=24hours

1 year=365 days

365days=24 x 365=8760hours

17 years

= 8760hours x 17

=148920hours

=1.4892 x [tex]10^{5}[/tex]

= 1.49 x [tex]10^{5}[/tex] hours

Answer:

1.49 x  hours

Step-by-step explanation:

1 day=24hours

1 year=365 days

365days=24 x 365=8760hours

17 years

= 8760hours x 17

=148920hours

=1.4892 x

= 1.49 x  hours

Answer:

This is a function because the Y values do not repeat.

Answer: i cant type it but take the images- hope that helps

Step-by-step explanation:

Answer:

Just -3 + 13n^4

Step-by-step explanation:

Answer:

32%

Step-by-step explanation:

Answer:

32%

Step-by-step explanation:

All you have to do is divide the numerator by the denominator and then multiply that result with 100

======================================================================

When you enter 8/25 into the above formula, you get (8/25)*100 which calculates to:

32%

Answer:

B

Step-by-step explanation:

Answer:

[tex]-1/13\text{ tub per hour}[/tex]

Step-by-step explanation:

First, let's find how much of the tub was used within the time.

We know that the tub was 2/3 full was Jenna started.

And it was only 1/6 full when Jenna ended.

Therefore, to find the amount used, we can subtract 1/6 from 2/3. So:

[tex]u=\frac{2}{3}-\frac{1}{6}[/tex]

Make a common denominator. Change 2/3 to 4/6 by multiplying both layers by 2. So:

[tex]u=\frac{4}{6}-\frac{1}{6}[/tex]

Subtract and reduce:

[tex]u=\frac{3}{6}=\frac{1}{2}[/tex]

Therefore, 1/2 of the tub was used after 6 1/2 hours.

To find the average hourly change, we will put the amount used over the amount of hours. 6 and 1/2 hours is the same as 13/2 hours. Therefore, the hourly change will be:

[tex]c=\frac{\frac{1}{2}}{\frac{13}{2}}[/tex]

Remember when dividing fractions, we:

1) Flip the divisor (the second number).

2) Change the division sign to a multiplication sign.

3) Multiply.

So:

[tex]c=\frac{1}{2}\div\frac{13}{2}\\\Rightarrow c=\frac{1}{2}\times \frac{2}{13}[/tex]

Multiply straight across and reduce:

[tex]c=\frac{2}{26}=\frac{1}{13}[/tex]

However, since we are using up the tub, our rate will be negative. Therefore:

[tex]c=-\frac{1}{13}[/tex]

Therefore, the average hourly rate was -1/13 tub per hour.

This means that after each hour, 1/13 of the tub will be used up.

Edit: Corrected Wrong Answer

Answer: -1/13 of a tub per hour

Step 1: Subtract.

2/3 - 1/6 = ?

Step 2: Find the common denominator.

4/6 - 1/6 = 3/6.

Step 3: Simplify the fraction.

3/6 = 1/2

Step 4: Put 1/2 over 13/2.

1/2 over 13/2

Step 5: Flip divisor around. Then divide.

1/2 ÷ 13/2

Step 6: Multiply.

1/2 × 2/13 = 2/26.

2/26 reduced = 1/13.

Since it was used, now it is -1/13

Answer = -1/13 of a tub per hour

Answer:

1

Step-by-step explanation:

[remember: any number raised to the power of 0 is 1]

∴ 12^0 = 1

hope it helps you!!

50%

You need to convert the fraction (ratio)

Afterwards, you will get your answer!

I don't know how to upload or I would upload a picture of my work and how to do it to help you.

I hope this helps you!

Answer:

50percent

Step-by-step explanation:

75 is half of 150

Answer:

Multiply 25.3 by 11.7, to get the answer of 296.01

Complete Question

The data for this question is shown on the first uploaded image

Answer:

The 95% confidence interval estimate of the population percentage is  

   [tex] 33.2\% <  p < 76.8 \% [/tex]

Step-by-step explanation:

On the data the first value is the height of the president while the other value is the height of his opponent

    The sample size is  n  =  20  

Looking at the data we see that out of the 20  presidents that only 11 is taller than their opponent

 So the proportion of presidents that are taller than their opponents is  

      [tex]\^ p = \frac{11}{20}[/tex]  

=>   [tex]\^ p = 0.55[/tex]

From the question we are told the confidence level is  95% , hence the level of significance is    

      [tex]\alpha = (100 - 95 ) \%[/tex]

=>   [tex]\alpha = 0.05[/tex]

Generally from the normal distribution table the critical value  of   is  

   [tex]Z_{\frac{\alpha }{2} } =  1.96[/tex]

Generally the margin of error is mathematically represented as  

   [tex]E = Z_{\frac{\alpha }{2} } *  \sqrt{\frac{\^ p (1- \^ p) }{n}} [/tex]

  [tex]E = 1.96 *  \sqrt{\frac{0.55 (1- 0.55) }{20}} [/tex]

   [tex]E = 0.218[/tex]

Generally 95% confidence interval is mathematically represented as  

      [tex]\r p -E <  p <  \r p +E[/tex]

=>    [tex]0.55-0.218 <  p < 0.55+ 0.218 [/tex]

=>    [tex]0.332 <  p < 0.768 [/tex]

Converting to percentage

        [tex](0.332*100)\% <  p < (0.768 *100) \% [/tex]

=>    [tex] 33.2\% <  p < 76.8 \% [/tex]

Answer:

1/4

Step-by-step explanation:

Answer:

9x-4

Step-by-step explanation:

Add 3x and 6x hope it help

Answer:

9x - 4

Step-by-step explanation:

3x + 6x - 4

First, combine like terms, so you would add 3x and 6x together to form 9x

9x - 4

Because you cannot simplify this equation any more, that is the answer

I hope this helps :)

Answer:

I hope this helps!

Answer:

b

Step-by-step explanation:

plz let me know if this was wrong... hope this helps

Answer:

A.

Step-by-step explanation:

Answer:

a.12

Step-by-step explanation:

4.8x2.5=12

Answer:

C

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

Answer:

D. rectangle

Step-by-step explanation:

The slopes of 2 lines are perpendicular when they are the negative reciprocal of each other. In this case, that is true, because 3 is the negative reciprocal of -1/3 and vice versa. This means it's either a rectangle or a square.

The lengths of the lines are not all the same, meaning it cannot be a square.

Therefore, the best name for the quadrilateral MATH is rectangle.

I hope this helped.

Answer:

Step-by-step explanation:

The answer would be, 25.17.

You need to multiple the total by 0.15 . Then add the answer to the total.

Answer:

$25.17

Step-by-step explanation:

$21.89 multiplied by 0.15 equals $3.28.

You then add the original bill to $3.28 which equals $25.17 for the total cost.