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2 years ago

Type the missing number that makes these fractions equal: 42/48=?/24

Mathematics

1 answer:

elixir [45]2 years ago

6 0

Answer:

Step-by-step explanation:

cross multiply

42 x 24 = 48x

1008 = 48x

x = 21

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2 years ago

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Given the function f(x) = 2x, find the value of f−1(32).

Oliga [24]

Answer:

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Step-by-step explanation:

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3 years ago

Part A: Abe rented a bike at $36 for 5 days. If he rents the same bike for 8 days, he has to pay a total rent of $48. Write an e

worty [1.4K]

y=4 x +(1.6 X 10)

y=4x +16

x=0 y=0+16 (0,16)

x=1 y=4 +16 (1,20) first day it cost $20

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3 years ago

Rewrite (123 + 456) + 789 using the Associative Law of Addition

adelina 88 [10]

Answer:

123 + (456 + 789)

Step-by-step explanation:

since this is an addition problem, the parenthesis don't matter, and they can be put wherever you want.

(123 + 456) + 789

123 + 456 + 789

(123 + 456 + 789)

123 + (456 + 789)

technically, any of these would work, but I think the kind of answer the problem is looking for is;

123 + (456 + 789)

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3 years ago

How many pounds of a 15% copper alloy must be mixed with 700lb of a 30% copper alloy to maybe a 25.5% copper alloy

lisov135 [29]

Answer:

$300\; \rm lb$ .

Step-by-step explanation:

Let $x$ represent the mass (in pounds) of that $15\%$ copper alloy required, such that the final mixture would contain $25.5\%$ copper by mass.

Consider: if $x$ pounds of that $15\%$ copper alloy is mixed with $700$ pounds that $30\%$ copper alloy, what would be the mass of copper in the mixture?

Mass of copper in $x$ pounds of that $15\%$ copper alloy: $(0.15\, x)\; \rm lb$ .
Mass of copper in $700$ pounds of that $30\%$ copper alloy: $700 \times 0.30 = 210\; \rm lb$ .