2 years ago

Can you please help me with this question

Mathematics

1 answer:

Sergeeva-Olga [200]2 years ago

6 0

Hirap nyan ah hahahahah

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In a mixture of concrete, there are five lb of cement mix for each pound of gravel. if the mixture contains a total of 198 lb o

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There are 39.6 lbs. of gravel.

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3 years ago

What is the function rule for the line?

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A: Slope:

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(

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2 years ago

What is the total surface area

Stels [109]

We have two right triangles and three different rectangles.

The formula of an area of a right triangle:

$A_T=\dfrac{1}{2}l_1l_2$

l₁, l₂ - legs

We have l₁ = 20cm and l₂ = 21cm. Substitute:

$A_T=\dfrac{1}{2}(20)(21)=(10)(21)=210\ cm^2$

The formula of an area of a rectangle:

$A_R=lw$

l - length

w - width

We have:

rectangle #1: l = 22cm, w = 29cm

$A_{R1}=(22)(29)=638\ cm^2$

rectangle #2: l = 22cm, w = 21cm

$A_{R2}=(22)(21)=462\ cm^2$

rectangle #3: l = 22cm, w = 20cm

$A_{R3}=(22)(20)=440\ cm^2$

The total Surface Area of the triangular prism:

$S.A.=2A_T+A_{R1}+A_{R2}+A_{R3}\\\\S.A.=2\cdot210+638+462+440=1960\ cm^2$

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3 years ago

A machine takes 5.4 hours to make 9 parts. At that rate how many parts can the machine make in 25.8 hours

Sliva [168]

$\frac{5.4}{9} = \frac{25.8}{x}$ Cross multiply.

5.4x=9*25.8

5.4x=232.2 Divide both sides by 5.4

x=43

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3 years ago

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Marat540 [252]

Answer:

3:5

Step-by-step explanation:

first half : 9

second half : 15

9:15 = 3:5

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3 years ago

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