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Zina [86]
3 years ago
11

X + 5y = 8 -x + 2y = -1 How is this solved?

Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
8 0
Add both the equations together to eliminate x

x+5y=8
-x+2y=-1

7y=7
y=1

Now fill in y into the original equation

x+5(1)=8
x+5=8
x=3

Now you can check by filling x and y into the second equation.

-(3)+2(1)=-1
-3+2=-1
-1=-1

So your answer will be (3, 1)

Brainliest my answer if it helps you out?
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A 2-column table with 4 rows. Column 1 is labeled Number of Weeks with entries 4, 5, 6, 7. Column 2 is labeled Weight (pounds) w
max2010maxim [7]

Answer:

The puppy weighed 6 pounds at birth

Step-by-step explanation:

You go from 4 to 0...seeing as the weight is changing by 2.5..you subtract 2.5 by 16, 4 times in order to get the birth weight.

16 - 2.5= 13.5 - 2.5 = 11 - 2.5= 8.5 - 2.5 =6

6 0
3 years ago
Read 2 more answers
The sum of ages of a mother and daughter is 45 years. Five years ago, the product of their ages was four times the mother's age
icang [17]

Answer: the answer is 36

Step-by-step explanation:

we can solve this using an algebra equation

so first from the world problem, we can tell that mother and daughter's ages added together is 45 we can represent this by saying x (mother's age), plus y (daughter's age) is 45.

(x+y)=45

Then we from the problem we know that 5 years ago the product of their ages is four times the mother's age at that time. From this, we can write

(x-5)*(y-5)=4*(x-5)

Then we just subtract the common denominators which is (x-5) so then the equation becomes

(y-5)=4

add 5 to both sides

y=9

Then all we do is plug the answer for y into the very first equation

x+9=45

Subtract both sides by 9

x=36

To double-check let's put the answers in the second equation

(36-5)*(9-5)=4*(x-5)

we get

(31)*(4)=4*(31)

so it's right I think

6 0
3 years ago
What is the value of x?
Assoli18 [71]

Answer:

a. 125

Step-by-step explanation:

the angle labeled "x" is supplementary with the angle that has a measure of 55°

Supplementary angles add up to equal 180°

This means that x + 55 must equal 180

Note that we've just created an equation that we can use to solve for x.

We now solve for x using the equation we just created.

x + 55 = 180

subtract 55 from both sides

x = 125

The answer is a

3 0
3 years ago
Read 2 more answers
What is the minimum number of the data set shown on the box-and-whisker plot?
Dmitriy789 [7]
Hello there, and thank you for posting your question here on brainly.

Short answer: C. 9

Why?

Box and whisker plots are confusing, the line in the middle is the median, but we don't need to do that now. The dots on the lines outside of the box show the largest and the shortest number. The plotted point on the way left is your answer, the line plotted is 9.

[Mark as Brainliest!]
3 0
4 years ago
Can anyone help me with my algebra work for #14 and #15?
DerKrebs [107]
14.yes
15. EDF,FDE,ED,FD,DE and DF
(i think this is correct)
6 0
4 years ago
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