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nlexa [21]
1 year ago
14

Which statement correctly explains how Andre could find the solution to the following system of linear equations using eliminati

on?Multiply the first equation by –7 and the second equation by 8, and then subtract.Multiply the first equation by -7 and the second equation by 8, and then add.Multiply the first equation by 2 and the second equation by 9, and then add.Multiply the first equation by –2 and the second equation by 9, and then subtract.Which statement correctly explains how Andre could find the solution to the following system of linear equations using elimination?Multiply the first equation by –7 and the second equation by 8, and then subtract.Multiply the first equation by -7 and the second equation by 8, and then add.Multiply the first equation by 2 and the second equation by 9, and then add.Multiply the first equation by –2 and the second equation by 9, and then subtract.
Mathematics
1 answer:
grin007 [14]1 year ago
7 0

umm ,this is too long could you maybe putt it in smaller form so I can answer

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A highway had a landslide, where 3,000 cubic yards of material fell on the road, requiring 200 dump truck loads to clear. On ano
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3,000 yd3 = 200 dtl
Chapter 1: Problem Solving 17 / 21

Rates Question
12 A highway had a landslide, where 3,000 cubic yards of material fell on the road, requiring 200 dump truck loads to clear. On another highway, a slide left 40,000 cubic yards on the road. How many dump truck loads would be needed to clear this slide?
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El Sr negron tiene que redactar una serie de cartas en su oficina. A Lourdes le toma 6 horas pasar todas las cartas. A su compañ
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El Sr negron tiene que redactar una serie de cartas en su oficina. A Lourdes le toma 6 horas pasar todas las cartas. A su compañera rosabel, le toma 9 horas en realizar la misma tarea. Si ambas trabajan juntas para hacer todo el trabajo d ela oficina,

a. Cuánto tiempo le tomará a ambas realizar el trabajo?

Answer:

3.6 horas

Step-by-step explanation:

Sea el número total de horas que ambos trabajaron = T

Deje que la cantidad total de letras por las que pasaron = 1

De la pregunta, se nos dice:

Lourdes necesitó 6 horas para revisar las cartas.

Esto significa que, cada 1 hora, Lourdes revisaba 1/6 de las letras

Rosabel tardó 9 horas en leer las letras.

Esto significa que, cada 1 hora, Rosabel revisó 1/9 de las letras

Por lo tanto,

(1/6 × 1) T + (1/9 × 1) T = 1

(1/6 + 1/9) T = 1

(3 + 2/18) T = 1

(18/5) T = 1

5T / 18 = 1

Cruz multiplicar

5T = 18

T = 18/5

T = 3.6 horas

Por lo tanto, les tomó a ambas 3.6 horas hacer el trabajo.

7 0
2 years ago
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