All categories

2 years ago

Look at image...........

Mathematics

2 answers:

Mekhanik [1.2K]2 years ago

4 0

Answer:

Step-by-step explanation:

2x + 3y = 6

y = x/3 - 3

Since the second equation is already solved for y, we can easily use the substitution method.

Substitute y in the first equation with x/3 - 3

2x + 3(x/3 - 3) = 6

2x + x - 9 = 6

3x = 15

x = 5

Now use the second equation, and x = 5, to solve for y.

y = x/3 - 3

y = 5/3 - 3 = 5/3 - 9/3

y = -4/3

Answer: (5, -4/3)

Svetlanka [38]2 years ago

3 0

Answer:

your answer would be B

Step-by-step explanation:

You might be interested in

How do you turn a fraction into a decimal?

GalinKa [24]

You can turn a fraction into a decimal by dividing.

Example: 1/2

1 divided by 2 = 0.5

4 0

3 years ago

You pay $14.82 for 1.5 pounds of ham. You buy 2.25 pounds of roast beef for $12.40 per pound. a. How much less does ham cost per

shutvik [7]

Answer:

A.) $2.52 less per pound. B.) $13.08 more

Step-by-step explanation:

A.) You pay $14.82 for 1.5 lbs of ham. You divide $14.82 by 1.5 lbs (14.82/1.5) to figure out how much you spend per pound of ham. You should get $9.88. Since you spend $12.40 per pound of roast beef, you subtract $9.88 from $12.40 ($12.40 - $9.88). You should get $2.52, which is your answer.

B.) Since you paid $14.82 for 1.5 lbs of ham, you already have this variable. Take the 2.25 lbs of roast beef and multiply it by $12.40 per pound (12.40*2.25). You then take that number ($27.90) and subtract it by $14.82 (27.90-14.82) and you should get your answer, $13.08.

5 0

3 years ago

7.9% - 0.25 = 3.2 + x

seraphim [82]

Answer:

x = 3.391

Step-by-step explanation:

first you calculate.

7.9% - 0.25 = 3.22 + x

divide the numbers

$\frac{7.9}{100}$ - 0.25 = 3.22 + x

calculate again.

0.079 - 0.25 = 3.22 + x

move the terms

-0.171 = 3.22 + x

add the numbers

-x = 3.22 + 0.171

then change the signs

-x = 3.391

Final ans : x = -3.391

or some alternate answer's

x = - $\frac{3391}{1000}$ , x = -3 $\frac{391}{1000}$

3 0

3 years ago

Read 2 more answers

Can some one please help me with this math question? Please and thank you

Bond [772]

Answer:

$V = 6373.2cm^3$

Step-by-step explanation:

Given

$V = \frac{4}{3}\pi r^3$ --- Volume

$D = 23cm$ --- Diameter

Required

Find the volume

First, we calculate the radius, r

$r = \frac{1}{2}D$

Substitute 23 for D

$r = \frac{1}{2} * 23$

$r = 11.5$

Substitute 11.5 for r in $V = \frac{4}{3}\pi r^3$

$V = \frac{4}{3} * \frac{22}{7} * 11.5^3$

$V = \frac{4*22*11.5^3}{3*7}$

$V = \frac{133837}{21}$

$V = 6373.19047619$

$V = 6373.2cm^3$

5 0

3 years ago

A web store offers two versions of a popular song. The size of a standard version is 2.9 MB. The size of the high-quality versio

olasank [31]

Answer:

This problem is a great systems of equations problem--you have two different variables: song size and number of songs.

Let's call the number of standard version downloads (S) and the high quality downloads (H).

You can make two statements:

For number of songs downloaded: S + H = 910

For download size: 2.8(S) + 4.4(H) = 3044.

S will be the same number in both equations and H will be the same number in both equations, so to find S, we can rearrange the first statement to H = 910 - S, then substitute or plug in (910 - S) wherever you see an H in the second equation so that you have only S's in your equation. Should look like this:

2.8(S) + 4.4(910 - S) = 3044

2.8S + 4004 - 4.4S = 3044

-1.6S = -960

s = 600

Your question only asks for the standard version downloads, but to help you out in future Systems situations-

You can also solve for H once you have S by plugging it into either of your equations like this:

600 + H = 910

-600

H=310

Step-by-step explanation:

hope it help

*comment if my answer is wrong*

5 0

3 years ago