x+5y=4
Solve by elimination
The solution to the system of equation 4x - 9y = -42 and x + 5y = 4 is x = -6 and y = 2.
Given the system of equations in the question:
4x - 9y = -42
x + 5y = 4
To solve the system of equations using the elimination method, first multiply the second equation by 4:
4[ x + 5y = 4 ] → 4x + 20y = 16
Hence, we have:
4x - 9y = -42
4x + 20y = 16
Subtract the first equation from the second equation to eliminate 4x:
0 - 29y = -58
29y = 58
y = 58/29
y = 2
Plug y = 2 into equation 2 and solve for x;
x + 5y = 4
x + 5(2) = 4
x + 10 = 4
x = 4 - 10
x = -6
Therefore, the value of x is -6 and y is 2.
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Answer:
x = -6 and y = 2
Step-by-step explanation:
4x-9y = -42
x+5y = 4
4x-9y = -42
4x + 20y = 16
Take them away from each other.
-29y = -58
Find what one y is by dividing.
-58 / -29 = 2
y = 2
Substitute back into original.
x + 10(5*y) = 4
Take 10 away to find x.
x = -6
Check if answer is correct.
4x - 9y = -42
-24 - 18 = -42
Final Answer: x = -6 and y = 2
Answer:
21
Step-by-step explanation:
21
1.) y - 4 = -8(x - 1)
2.)y =^4 (Four is an exponent)
3.)y-x^2 = 4.5 (Two is an exponent)
4.)3x + 5y = 15
____
I need help A.S.A.P, any help is appreciated!
Given:Joann has 3 green marbles 5 blue marbles and 9 yellow marbles.
The ratio is asking us to find the ratio of green and Blue marble.A ratio is a statement of how two numbers compare. It is a comparison of the size of one number to the size of another number.Ratios can be shown using the ":" to separate the numbers.Ratio of Green :Blue:Yellow =3:5:9
The ratio of green and Blue marbles =3:5.
Answer:
(1/2)(10)(x + 15 + x) = (2/5)(10)(20 + x)
(1/2)(2x + 15) = (2/5)(x + 20)
5(2x + 15) = 4(x + 20)
10x + 75 = 4x + 80
6x = 5
x = 5/6
NB = 5/6
Answer:
44 coffee mugs
Step-by-step explanation:
Think of 28 + 16
That should tell you how many blue coffee mugs there are because ,it's less than and if you take that 28 and add it by the amount of blue mugs you get your answer.