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3 years ago

Divide $2.50 in a ratio of 4:1

Mathematics

1 answer:

hram777 [196]3 years ago

4 0

Step-by-step explanation:

$4x + x = 2.5 \\ \\ \therefore \: 5x = 2.5 \\ \\ \therefore \: x = \frac{2.5}{5} = 0.5 \\ \\ \therefore \: 4x = 4 \times 0.5 = 2$

Hence, 2.50 in the ratio 4 : 1 can be divided as 2 and 0.5

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What is equivalent to(x+8)(x-7)

ziro4ka [17]

Hi there!

To multiply, we need to use f.o.i.l:

(x + 8)(x - 7)
= x * x - 7 * x + 8 * x - 8 * 7
= x^2 - 7x + 8x - 56
= x^2 + x - 56

Hope this helps!

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3 years ago

Metal mercury at room temperature is a liquid. Its melting point is -39°C. The freezing point of alcohol is-114°C. How much warm

Fofino [41]

75 degrees warmer.

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3 years ago

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Nostrana [21]

2.8 is your answer...

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3 years ago

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Alonzo works as a car detailer. He charges $175 per car. He is planning to move out of his parents' house and rent his first apa

Inessa05 [86]

Answer:

10 cars

Step-by-step explanation:

Variable c = car

Step 1: form an equation

175c + 1886 = 115 + 965 + (1240)2

Step 2: isolate variable c and solve

175c + 1886 = 3560

175c = 3560 - 1886

175c = 1674

c = 1674 ÷ 175

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*He will not get paid until the full car is detailed. Therefore, decimals (seen as half a car) will not pay him anything.*

Step 3: round up to the nearest whole number

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3 years ago

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When deriving the quadratic formula by completing the square, what expression can be added to both sides of the

liubo4ka [24]

Answer:

The element you add is $b^2 / 4a$

Step-by-step explanation:

The element you add is $b^2 / 4a$

Remember that

$a x^2 + bx +c \\= a ( x^2 +(b/a)x ) + c$

So, in order to complete the square you add $(b/2a)^2$

But when you multiply times $a$ you get

$b^2 / 4a$

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2 years ago

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