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Ivenika [448]
4 years ago
11

Equation A: y = −x + 5

Mathematics
1 answer:
Yuliya22 [10]4 years ago
5 0
You can put first equation of y to second and u get
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Solve the system of linear equations by substitution
Elodia [21]
X= 5y + 1

-2x + 9y = -1

-2(5y + 1) + 9y = -1

-10y - 2 + 9y = -1

-y - 2 = -1

-y = 1

y = -1

x + 5 = 1

x = -4

(-4, -1)
8 0
3 years ago
Check all of the ordered pairs that satisfy the equation below.y=2/5x
zvonat [6]

We are going to do this step by step:

Let's start with option A

A.

X = 25 and Y = 5/2

y=\frac{2}{5}\cdot x=\frac{2}{5}\cdot25=\frac{2\cdot25}{5}=\frac{50}{5}=\frac{5\cdot10}{5\cdot1}=10

In this case, when X = 25 , then Y = 10 ,which is different to 5/2

B.

X = 14 , Y = 35

y=\frac{2}{5}\cdot14=\frac{28}{5}

In case, when X = 14, then Y = 28/5, which is different to 35

C.

X = 40 , Y = 24

y=\frac{2}{5}\cdot40=\frac{80}{5}=16

Similarly, in this case, when X = 40, then Y = 16, which is different to 24

D.

X = 10 , Y=4

y=\frac{2}{5}\cdot10=\frac{20}{5}=4

Now, in this case, we can see that when X = 10, then Y = 4 which is the same as the given value of Y

E.

X = 50 , Y = 20

y=\frac{2}{5}\cdot50=\frac{100}{5}=20

In this case, the values of Y are also the same.

F.

X = 30 , Y = 12

y=\frac{2}{5}\cdot30=\frac{60}{5}=12

Again, in this case, the values of Y are the same, so the pair satisfies the equation.

In conclusion: options D, E and F satisfy the equation

3 0
1 year ago
What fraction is equal to .13
const2013 [10]

Answer: 13/100

Step-by-step explanation:

any number with 100 as it denominator and that is less than 100 is it's self but move the decimal back for how many place values it have.

for example:

1/100=  .1

99/100= .99

6 0
3 years ago
Julia spends $5.75 on gas for her lawn mower. She earns $18.00 mowing her neighbor's yard. What is Julia's profit?
Alex787 [66]
Hello!

Subtract the cost of the gas from Julie's total earnings find what Julie's profit was.

18 - 5.75 = 12.25

A N S W E R:

Julie's profit is $12.25.
7 0
3 years ago
The price of sugar increase from shs 1000 to shs 1200.In what percentage did the price increase​
Nataly_w [17]

Answer:

20%

Step-by-step explanation:

1000×120%=1200

120-100=20

6 0
3 years ago
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