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shusha [124]
3 years ago
13

What is the solution to the following system of equations? x+y=5 x-y=1 step by step

Mathematics
1 answer:
Andreas93 [3]3 years ago
8 0
x+y=5
-x -x

Equals:

y=-x+5

Now you have:

y=-x+5
x-y=1

Insert -x+5 into y

x-x+5=1

Combine like terms

2x+5=1

Subtract 5.

2x=-4

Divide 2.

Answer: x=-2

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Please help 20 points!!!!!
skad [1K]

Three students want to estimate the mean backpack weight of their schoolmates. To do this, they each randomly chose 8 schoolmates and weighed their backpacks. Then as per the given sample data,

(a) The sample means of the backpacks are: 6.375,6.375,6.625

(b) Range of sample means: 0.25

(c)The true statement is: The closer the range of the sample means is to 0, the less confident they can be in their estimate.

For the first sample, mean= 6.375

For the second sample, mean= 6.375

For the third sample, mean= 6.625

Range of sample means=Maximum Mean- Minimum Mean

                                        = 6.625 - 6.375

                                        = 0.25

The students will estimate the average backpack weight of their classmates using sample means, the true statement is:

The closer the range of the sample means is to 0, the more confident they can be in their estimate.

Learn more about range here:

brainly.com/question/24326172

#SPJ1

6 0
1 year ago
If inflation from last year to this year was 2% and a pair of designer jeans sold for $75 last year, what would you expect to pa
tamaranim1 [39]

Answer:

$76.5

Step-by-step explanation:

We have been given that inflation from last year to this year was 2% and a pair of designer jeans sold for $75 last year. We are asked to find the price of pair of designer jeans this year.

An inflation of 2% will increase the price of pair of jeans by 2%, so price of pair of jeans this year would be $75 plus 2% of $75.

\text{Price of pair of jeans this year}=\$75+\$75\times\frac{2}{100}

\text{Price of pair of jeans this year}=\$75+\$75\times0.02

\text{Price of pair of jeans this year}=\$75+\$1.5

\text{Price of pair of jeans this year}=\$76.5

Therefore, the price of pair of jeans would be $76.5 this year.

7 0
3 years ago
Help please no need for explanation
dusya [7]
It would be A=45, but i don't understand why you have a 3 above your answer
8 0
3 years ago
Read 2 more answers
Greensboro gets 12 times as many inches of snow as Redville gets. Altoghter, the two towns gets 65 inches of snow.How many inche
Tomtit [17]
Inches of snow Greensboro gets = g
Inches of snow Redville gets = r

\left \{ {{g=12r} \atop {g+r=65}} \right.  \\  \\ (12r)+r=65 \\ 13r=65 \\ r=5

Redville gets 5 inches of snow.
6 0
3 years ago
PLZ HELP EASYY 10 POINTS *easy*
elena-14-01-66 [18.8K]

Answer:  what the other guy said 69

Step-by-step explanation:

5 0
2 years ago
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