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m_a_m_a [10]
3 years ago
7

Solve the proportion 9/12 = 15/a

Mathematics
1 answer:
evablogger [386]3 years ago
3 0

Answer:

a=20

Step-by-step explanation:

You cross multiply: 9a=180

a=20.

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lilavasa [31]
You could first solve for y, assuming x is 0, and y = 6. Then solve for x, and that means y = 4.
3 0
3 years ago
Una pared rectangular tiene un perímetro de 48 metros. El largo de la pared es el doble del ancho. ¿Cuántos metros cuadrados de
AveGali [126]
Datos:
Perímetro = 48m
Ancho = x
Largo = 2x
Área = (2x)(x)

Ecuación:
2x + 4x = 48
6x = 48
x = 48/6
x = 8

Sustitución:
Área = [2(8)](8)
Área = (16)(8)
Área = 128

Respuesta: Se necesitarán 128 metros cuadrados de papel decorativo
4 0
3 years ago
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Ulleksa [173]

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7 0
2 years ago
Write an equation for the nth term of the arithmetic sequence. Then find a50.<br> 8, 2, -4, - 10,
AlexFokin [52]
Answer: See below

Explanation:

Write an equation for nth term:

a + d(n - 1)

a = 8 (first term)
d = -6 (common difference)

8 - 6(n - 1)
= 8 - 6n + 6
= -6n + 14

Find a 50:

-6(50) + 14
= -300 + 14
= -286

6 0
3 years ago
The difference between x and half of y
Nataliya [291]
You could do y÷2-x to get x - half of y
7 0
3 years ago
Read 3 more answers
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