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3 years ago

Which three numbers would correctly complete the number sentence?

Mathematics

1 answer:

nikitadnepr [17]3 years ago

7 0

Answer:

what are the numbers

Step-by-step explanation:

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When dividing 918 by 4.2, what number should the divisor be multiplied by in order to make it a whole number?

Alexandra [31]

B. Because the divisor, 4.2, has only value in the ones and tenths places, so we only have to multiply by 10 to get to 42, which is the whole number you need.

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3 years ago

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In ∆MNP, m∠N = 90º, NH – altitude, m∠P = 21º, PM = 4 cm. Find MH.

Sveta_85 [38]

Answer:

0.51 cm

Step-by-step explanation:

In right triangle MNP, MP = 4 cm, m∠N = 90°, m∠P = 21°

By the sine definition,

$\sin \angle P=\dfrac{\text{Opposite leg}}{\text{Hypotenuse}}=\dfrac{MN}{MP}\\ \\MN=MP\sin \angle P\\ \\MN=4\sin 21^{\circ}\approx 1.43\ cm$

Now, consider right triangle HMN (it is right because NH is an altitude). By the cosine definition,

$\cos \angle M=\dfrac{\text{Adjacent leg}}{\text{Hypotenuse}}=\dfrac{MH}{MN}\\ \\MH=MN\cos \angle M$

In the right triangle, two acute angles are always complementary, so

$m\angle M=90^{\circ}-m\angle P=90^{\circ}-21^{\circ}=69^{\circ}$

Thus,

$MH=1.43\cos 69^{\circ}\approx 0.51\ cm$

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3 years ago

What is the formula for surface area

zubka84 [21]

The area is perimeter times height plus area of the bases

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(200 x 3) + (50 x 3)

m_a_m_a [10]

200x3=600

50x3=150

600+150=750

750

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Jawad has seven rocks

Neporo4naja [7]

Answer:

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Step-by-step explanation:

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