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Vlad [161]
3 years ago
14

gn="absmiddle" class="latex-formula">
Mathematics
1 answer:
neonofarm [45]3 years ago
4 0

Answer:

x = -3 and x = 1

Step-by-step explanation:

first, square each side

12 - 8x = x² - 6x + 9

x² + 2x - 3 = 0

(x - 1)(x + 3) = 0

x = -3

x = 1

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1) 10 + 5x = -40<br> solving two step equations
kenny6666 [7]

Answer:

10+40=5x

50=5x

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3 0
3 years ago
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Jennifer has 3 1/2 cups of jelly beans to share with 7 friends how many cups does each person get
AfilCa [17]
Divide 3 1/2 by 7= 1/2 a cup per person
6 0
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Manuel hizo un viaje en el coche, en el cual consumió 20 litros de gasolina. El trayecto lo hizo en dos partes: en la primera, c
Alona [7]

Responder:

24 litros; 16 litros; 4 litros

Explicación paso a paso:

Dado que:

Gasolina consumida = 20 litros

Sea la cantidad de gasolina en el tanque = x

Primera parte del viaje = 2/3 de x

Segunda parte del viaje = 1/2 de (x - 2x / 3)

Cantidad de gasolina en el tanque:

2x / 3 + 1/2 (x - 2x / 3) = 20

Solución para x

2x / 3 + x / 2 - x / 3 = 20

(4x + 3x - 2x) / 6 = 20

5 veces / 6 = 20

5 veces = 20 * 6

5 veces = 120

x = 120/5

x = 24

Cantidad de gasolina en el tanque = 24 litros

Litros consumidos en cada etapa:

Primera parte = 2/3 de 24 = 48/3 = 16 litros

2a parte = 0.5 de (24 - 16) = 0.5 * 8 = 4 litros

3 0
3 years ago
Saylor Henshaw earned $120 in simple interest in 9 months at an annual interest rate of 5%. How much money did he invest?
Ksju [112]
Annual interest is P*r^t, r is 0.05 here, t is 9/12=3/4=0.75
P*0.05^0.75=120
use your calculaor: P= 120÷ (0.05)^0.75=1135
so he invested about 1135 dollars
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3 0
3 years ago
A package of 24 pencils costs 2.88$. at this rate how much would 30 pencils cost?
ASHA 777 [7]
24➗2.88=0.8 30➗0.8 = 3.75 So the answer is 3.75
6 0
3 years ago
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