3 years ago

The present shown below is a cube.

Mathematics

1 answer:

anastassius [24]3 years ago

8 0

Answer:

SA = 2400 cm²

Step-by-step explanation:

SA of a cube = S² x 6 (the number of its faces)

SA = 20² x 6

SA = 400 x 6

SA = 2400 cm²

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3) Caleb's cellphone says that it is 20% charged. He has 45

ra1l [238]

Answer:

225 minutes

Step-by-step explanation:

45 min = 20% = 20/100

20 x 5 = 100

45 x 5 = 225

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3 years ago

What does x=? I know it is vertical

Rudik [331]

The angles are <span>supplementary
</span>
7x + x + 20 = 180
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3 years ago

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Three times two less than a number is greater than or equal to five times the number. Find all of the numbers that satisfy the g

ahrayia [7]

Answer:

you are correct

Step-by-step explanation:

you are correct

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3 years ago

A standard baseball diamond is a square with 90-foot sides and a base at each corner. To the nearest foot, what is the greatest

solong [7]

The longest distance would be from two opposite bases. For example, if we were to connect home plate with 2nd base, the line between the two bases would be longer than the distance between home and 1st. This is because in a right triangle, the hypotenuse is always the longest side.

We can use Pythagorean Theorem to find the distance.

$a^2 + b^2 = c^2$

$90^2+90^2 = c^2$

$c^2 = 16200$

$c= \sqrt{16200}$

$c = 127.28 feet$

To the nearest foot, the answer is 127 feet.

5 0

3 years ago

Find two consecutive positive integers such that the square of the first decreased by 17 equals 4 times the second.

Zina [86]

Answer:

The two consecutive positive integers are 7 and 8

Step-by-step explanation:

Let

x ----> the first positive integer

x+1 ----> the second consecutive positive integer

we know that

$x^{2} -17=4(x+1)$

Solve for x

$x^{2} -17=4x+4\\ \\x^{2}-4x-21=0$

Solve the quadratic equation by graphing

The solution is x=7

see the attached figure

Find the value of x+1

x+1=7+1=8

therefore

The two consecutive positive integers are 7 and 8

3 0

3 years ago