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Nonamiya [84]
3 years ago
10

Use substitution to find the solution to the system of equations.

Mathematics
2 answers:
Mariana [72]3 years ago
7 0

Answer:

A. (-3,-2)

Step-by-step explanation:

In substitution method for solving a system of equation we find the value of a variable from one equation and put it into the other equation.

Here, the given system of equation,

5x+7y=-29  ----(1)

y=x+1 -----(2),

Substitute the value of y from equation (2) to equation (1),

5x + 7(x+1) = -29

5x + 7x + 7 = -29

12x + 7 = -29

12x = -36

x = -3

From equation (2),

y = -3 + 1 = -2

Hence, the solution of the given system is ( -3, -2 )

Option A is correct.

mote1985 [20]3 years ago
4 0

Answer:

Ummm, so the answer is A. (-3,-2)

StepByStep Solution:

5x + 7(x+1) =-29

5x+7x+7=-29

12x=-36

x=-3

y=-3+1

y=-2

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The functions q and r are defined as follows.<br> HELP PLEASE
dusya [7]

Answer:

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Step-by-step explanation:

First do r(3) by replacing x with 3 in r:

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Then replace r(3) with 20 to do q(20):

-20-2 = -22

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3 years ago
Solve using the quadratic formula<br><br> x^2-4x+1=0
sergiy2304 [10]

Answer:

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Step-by-step explanation:

solve the equation for x by finding a, b, and c of the quadratic then applying the quadratic formula.

4 0
3 years ago
Read 2 more answers
4.
valkas [14]

Answer: \boxed{y=\frac{4}{5}x-2}

Step-by-step explanation:

Perpendicular lines have slopes that are negative reciprocals, so as the slope of the given line is -5/4, the slope of the perpendicular line is 4/5.

Substituting into point-slope form,

y-6=\frac{4}{5}(x-10)\\\\y-6=\frac{4}{5}x-8\\\\\boxed{y=\frac{4}{5}x-2}

4 0
2 years ago
Write the expression in complete factored<br> form.<br> 5(a - 5) + a(a -5) =
balu736 [363]

Answer:

a^2 - 25

Step-by-step explanation:

5(a-5) turns into 5a - 25

a(a-5) turns into a^2 - 5a

added together, it's a^2 - 25

8 0
3 years ago
A bottle contains 1.7 L of water. A second bottle contains 450 mL of water. What is the total number of mL of water in both bott
amm1812

Answer:

2150 mL

Step-by-step explanation:

1L=1000mL - convert

1.7mL=1700mL - convert problem numbers

1700+450mL - addition

2150mL- answer

5 0
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