All categories

4 years ago

2x-y=7 3x+y=8 what is the answer to this problem

Mathematics

1 answer:

kakasveta [241]4 years ago

3 0

Answer:

x is equal to 3 and y is equal to mines1

Step-by-step explanation:

add both together and you will get

$5x = 15$

and then it is easy to solve

You might be interested in

a discount store marks up the merchandise it sells by 55%. If the wholesale price of a particular item is $25, what should be th

Nesterboy [21]

First find out what 55% of $25 is by doing 25 times .55 which is 13.75, then add 25+13.75 and that should be your answer

7 0

3 years ago

In three hours, Company ABC can make X ball bearings. Company DEF can make X ball bearings in 4 hours. Company GHI can make X ba

amm1812

Answer:

X ball bearings will be made in 1 hour and 20 minutes

Step-by-step explanation:

Proportions

The proportions give us an important tool to easily solve common problems of any type. We know that:

Company ABC can make X ball bearings in 3 hours.

Company DEF can make X ball bearings in 4 hours.

Company GHI can make X ball bearings in 6 hours.

In one hour, each company can make

ABC: X/3 ball bearings

DEF: X/4 ball bearings

GHI: X/6 ball bearings

Working together, they can make

$\displaystyle \frac{X}{3}+\frac{X}{4}+\frac{X}{6}$

ball bearings. Operating

$\displaystyle \frac{4X+3X+2X}{12}=\frac{9X}{12}=\frac{3X}{4}$

If they can make 3/4 of a ball bearing in one hour, then one complete ball bearing will need

$\displaystyle \frac{4}{3}$ hours to complete. It's equivalent to 1 1/3 hours or 1 hour and 20 minutes

X ball bearings will be made in 1 hour and 20 minutes

8 0

3 years ago

Is a good economist always objective or

Mashutka [201]

anwer

yes good economist is always objective.

3 0

3 years ago

Solve using the Zero-Product Property (x - 11)(5x + 1) = 0 Show your work or not.

Illusion [34]

Step-by-step explanation:

third and the yellow one will be the answer

x=11,X=-1/5

6 0

3 years ago

Diana invested $3000 in a savings account for 3 years. She earned $450 in interest over that time period. What interest rate did

matrenka [14]

If I=P*r*t, we can input 450 in for I, 3000 in for the principal (P, or the starting rate), and 3 for t=time because there were three years, resulting in 450=9000*r. Next, we can divide both sides by 9000 to get 0.05 or 5% as our answer.

8 0

3 years ago