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2 years ago

Solve each question mentally -3x = 21

1 answer:

6 0

X = -7

3 • 7 = 21

-3 • (-7) = 21

If you multiply two negative numbers you’ll end up with a positive. Thus, - 3 (-7) = 21.

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This data set gives the scores of 41 students on a biology exam: {66, 67, 67, 68, 80, 81, 81, 82, 22, 65, 66, 68, 69, 70, 71, 71

Naddika [18.5K]

I think the answer is 74.

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3 years ago

Find the value of x to the nearest tenth 10 and 35

Verdich [7]

We can use the tangent rule for this problem because the opposite x is unknown and adjacent side 10 is knwon. Since,

$tan \theta= \frac{Opposite side}{Adjacent side}$

$tan 35=\frac{x}{10}$

$0.474=\frac{x}{10}$ Since tan 35°=0.474

$0.474*10=\frac{x}{10}*10$ Multiplying each sides by 10.

4.74=x

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3 years ago

A square pyramid is sliced in half, parallel to the base.

DIA [1.3K]

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2 years ago

Read 2 more answers

How do you solve this

dmitriy555 [2]

-3w-12=-18

-3*2-12=-18

so w=2

hope this helps

7 0

3 years ago

We have seen that isosceles triangles have two sides of equal length. The angles opposite these sides have the same measure. Use

dedylja [7]

angle 1 = 180° - 115° (Linear Pair)

angle 1 = 65°

angle 2 = angle 1 = 65° ( Angles on the equal sides of an isosceles triangle )

angle 3 = 180° - (65° + 65°) (Angle Sum Property)

angle 3 = 180° - 130°

angle 3 = 50°

angle 4 = 180° - 65° (Linear Pair)

angle 4 = 115°

angle 5 = 115° (Vertically Opposite Angles)

6 0

3 years ago