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3 years ago

13

A 10-foot ladder is leaning against a building, with the base of the ladder 5 feet from the building. how high up on the build

ing will the top of the ladder reach?

1 answer:

makkiz [27]3 years ago

4 0

Pythagorean therom
5^2+b^2=10^2
8.6

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Ax + b = c for c<br><br> What is the answer to that ^

Murljashka [212]

Answer:

c = ax + b

Step-by-step explanation:

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3 years ago

How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

kolbaska11 [484]

Answer:

120 liters of 60% alcohol solution is needed

Step-by-step explanation:

Let's assume

x liters of 60% alcohol solution is added

so, we get solution as

$=\frac{60}{100}\times x$

$=0.6x$

we are given

40 liters of a 20% alcohol solution is

$=40\times\frac{20}{100}$

$=40\times\frac{20}{100}$

$=8$

so, total alcohol solution is

$=8+0.6x$

now, we can find total solutions

total solutions is

$=x+40$

now, it is making 50% solution

so, we get

$\frac{8+0.6x}{x+40} =\frac{50}{100}$

now, we can solve for x

$\left(8+0.6x\right)\cdot \:100=\left(x+40\right)\cdot \:50$

$800+60x=50x+2000$

$10x=1200$

$x=120$

So,

120 liters of 60% alcohol solution is needed

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3 years ago

The temperature at a mountain base camp was −3 degrees Celsius on Monday. Tuesday morning, the temperature was 2 degrees Celsius

nexus9112 [7]

Answer:

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Step-by-step explanation:

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2 years ago

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3 years ago

Twice a number is 60 more than five times the number. what is the number?

Delvig [45]

Let the number be represented by x
2x=60+ 5x -20*2=60+5*-20
2x-5x=5x-5x+60 -40=60+-100
-3x=60 -40=-40
-3x/-3=60/-3
x=-20
Therefore the number is -20

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3 years ago