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Natali5045456 [20]
3 years ago
6

Use addition or substitution to find the value of y for this set of equations. 2x - 3y = -15

Mathematics
1 answer:
miskamm [114]3 years ago
3 0
Substitute 4y for x.

2(4y)-3y=-15

8y-3y=-15

5y=-15

Dividing by 5, we see that y=-3.
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Step-by-step explanation:

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128 is 74% of what number
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Martha compra 2 kilos de tomate y 1 kilo de cebolla pagando S/ 8,40. Si la siguiente semana compra 1 kilo de tomate y 2 kilos de
Rashid [163]

Responder:

2,40

Explicación paso a paso:

Dado que:

Dejar :

Tomate = t

Cebolla = n

(2 kilo de t) + (1 kilo de n) = 8.40

(1 kilo de t) + (2 kilo de n) = 7.80

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t + 2n = 7,80 - - (2)

De (2);

t = 7,80 - 2n

Ponga t = 7.80 - 2n en (1)

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8 0
3 years ago
3x3 – 19x2 + kx – 30<br> What is the value of k?
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Answer:

Let's simplify step-by-step.

(3)(3)−(19)(2)+kx−30

=9+−38+kx+−30

Combine Like Terms:

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=kx+−59

Answer:

=kx−59

6 0
3 years ago
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