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3 years ago

One number is 2 more than another. The difference between their squares is 20. What are the numbers?

Mathematics

1 answer:

ss7ja [257]3 years ago

4 0

Answer:

let x=one number =

x-2= another number

x²- (x-2)²=20

x²-x²-4x+4=20

-4x=20-4

-4x=16

x=16/-4

x=-4

one number is -4

x-2

-4-2

=-6

the another number is -6

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3 years ago

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swat32

Answer:

The height is 28.57 cm.

The surface area is 9,628 cm^2.

Step-by-step explanation:

I assume the cooler is shaped like a rectangular prism with length and width of the base given, and with an unknown height.

volume = length * width * height

First, we convert the volume from liters to cubic centimeters.

60 liters * 1000 mL/L * 1 cm^3/mL = 60,000 cm^3

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h = (60,000 cm^3)/(2,100 cm^2)

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2 years ago

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Anvisha [2.4K]

Answer:

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Step-by-step explanation:

You know a number 5 or greater will round up to the next higher number in the number place to its left. Similarly, numbers less than 5 round down (get replaced by zero).

This means that 75 will round up to 80. and 84.9999... will round down to 80.

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2 years ago

A triangle ABC has two side lengths of 28 ft. and 24 ft. If angle C is 91°, what's the measurement of angle B

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Answer:

Step-by-step explanation:

Given that in a triangle ABC, AB = 28, BC = 24 and angle C =91,

We have to find measure of angle B.

Since three measurements are given, we can solve the triangle easily

Use the sine formula for triangles.

$\frac{c}{SinC} =\frac{b}{Sin B}=\frac{a}{Sin A}$

$A = arcsin(\frac{asinC}{c} )=58.98$

Since sum of 3 angles is 180, we calculate B easily

Angle B = 180-(A+C)

= 180-(91+58.98)

=30.02

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2 years ago