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2 years ago

Rounding or compatible numbers for 87 + 34

Mathematics

2 answers:

Marina CMI [18]2 years ago

7 0

87 rounds to 90 and 34 rounds to 30 so 90 plus 30 equals 120

riadik2000 [5.3K]2 years ago

6 0

87 ⇒ 90

34 ⇒ 30
---- -----
121 120

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The length of a plot of land is

Firdavs [7]

Answer:

1/8 mile.

Step-by-step explanation:

That is 1/2 / 4

= 1 / 2 * 1/4

= 1/8 mile.

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2 years ago

An angle measures 40.2° more than the measure of its complementary angle. What is the measure of each angle?

vampirchik [111]

<h3>Solving for the measurements of Complementary Angles</h3><h3>Answer:</h3>

$24.9^{\circ}$ and $65.1^{\circ}$

<h3>Step-by-step explanation:</h3>

Recall that Angles that are complementary to each other add up to $90^{\circ}$ .

Let $a$ be the measure of the complementary angle.

If an angle is $40.2^{\circ}$ more than its complementary angle, the measure of that angle is $a +40.2$ . The sum of both angles are expressed $a +(a +40.2)$ but since the have to add to $90$ as they are complementary, $a +(a +40.2) = 90$ .

Solving for $a$ :

$a +(a +40.2) = 90 \\ a +a +40.2 = 90 \\ 2a +40.2 = 90 \\ 2a +40.2 -40.2 = 90 -40.2 \\ 2a = 49.8 \\ \frac{2a}{2} = \frac{49.8}{2} \\ a = 24.9$

Since the other angle measures $a +40.2$ , we can plug in the value of $a$ to find the measure of the angle.

Evaluating $a +40.2$ :

$a +40.2 \\ 24.9 +40.2 \\ 65.1$

The measure of the angles are $24.9^{\circ}$ and $65.1^{\circ}$

4 0

2 years ago

You want to buy a tent in the shape of a pyramid. The rectangular base is 35 square feet, with a height of 4 feet. What is the v

marin [14]

Answer:

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Step-by-step explanation:

The formula for volume of a pyramid is

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V = (1/3)(35)(4)

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3 years ago

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riadik2000 [5.3K]

The answer would be that the X=3

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2 years ago

13. Use a net to find the surface area of the prism.

Viefleur [7K]

Answer:

516 inches

Step-by-step explanation:

2(8(6)) + 2(15(6)) + 2(15(8))

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The answer is 516in

*Please mark me the brainliest. Thanks

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2 years ago