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crimeas [40]
3 years ago
14

Solve the system of linear equations by substitution. Check your solution.Numbers 10 and 14.​

Mathematics
1 answer:
Studentka2010 [4]3 years ago
6 0

Answer:

10) x =2, y = -2

14) x = -3, y = 4

Step-by-step explanation:

Check attachment

I hope this was helpful, Please mark as brainliest.

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Select the two values of x that are roots of this equation.<br> 2x+11x+15= 0
Amiraneli [1.4K]

Answer:

The roots of the equation are x=-3 and x=-2.5

Step-by-step explanation:

<u><em>The correct quadratic equation is</em></u>

2x^2+11x+15=0

we know that

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

2x^{2} +11x+15=0  

so

a=2\\b=11\\c=15

substitute in the formula

x=\frac{-11(+/-)\sqrt{11^{2}-4(2)(15)}} {2(2)}

x=\frac{-11(+/-)\sqrt{121-120}} {4}

x=\frac{-11(+/-)\sqrt{1}} {4}

x=\frac{-11(+/-)1} {4}

x_1=\frac{-11(+)1}{4}=-2.5

x_2=\frac{-11(-)1}{4}=-3

therefore

The roots of the equation are x=-3 and x=-2.5

5 0
3 years ago
What is 7vr - (-7rv)=
nata0808 [166]

Answer:

14vr

Step-by-step explanation:

7vr - (-7rv)=

Subtracting a negative is like adding

7vr + (7rv)=

Changing the order of rv to vr

7vr + (7vr)=

Combing like terms

14vr

8 0
3 years ago
When you purchase an item with a credit card, you might not ever have to pay for it. True False
Sergio039 [100]
False. You get billed by the end of the month the money is “borrowed” money from the bank until you have to pay it all back, if it’s not paid on time you have to pay extra (interest). With debit card your money is taken out immediately.
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If the equations 2x +y =7 and x-y=2are solved simultaneously, then y=_________​
alisha [4.7K]

Answer:

y = -2x + 7 and y = x - 2

Step-by-step explanation:

2x + y = 7

y = -2x +7

x - y = 2

-y = -x +2

y = x - 2

7 0
2 years ago
A box of laundry detergent contains 35cups. It takes 1 1/4 cups per load of laundry
Dahasolnce [82]

Answer:

I believe it's 28 loads

4 0
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