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Lorico [155]
3 years ago
10

Alexis uses toy blocks to build a building.each toy block is 1 cubic inch. The first three floors of the model are made up of 6

rows or 4 blocks. Floors 4- 8 are made up of 4 rows of 4 blocks. What is the volume of the model?
Mathematics
1 answer:
Masja [62]3 years ago
3 0


4*4=16.

16*14=

64

V: 64

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15. Before oil is added to a certain road surface material, the other ingredients are mixed. The mixture contains
mojhsa [17]

Answer:

sand = 3450 pounds

3/4 inch stones =6750 pounds

1 inch stones =4800 pounds.

Step-by-step explanation:

The mixture composition is :

45% three-quarter inch stones

32% inch stones and

sand for balance

The percent here is by mass of material used.

Weight of mixture is 15,000 pounds before oil addition.

Use the percent by weight for the two types of stones and calculate real values in pounds

Formula to apply is:

Mass percent = (mass of a material/ total mass of mixture) * 100

For 3/4 inch stones it will be:

0.45= \frac{x}{15000} *100\\\\0.45=\frac{x}{150} \\0.45*150=x\\x=6750

The 3/4 inch stones weigh 6750 pounds

The 1 inch stones will be

32/100 * 15000 =4800

The 1 inch stones weigh = 4800 pounds

Total for the two items : 4800+6750 =11550 pounds

The sand used weighs : 15000 - 11550 = 3450 pounds

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What does the equation y = -x mean
Aloiza [94]

It means the variable y is equal to the negative variable of x.

3 0
3 years ago
Which of the following relations is a function?
ale4655 [162]

Answer:

{(5, –4), (–4, 5), (–5, 4), (4, –5)}

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Which of the following are equivalent ratios?<br><br> 15 to 20<br> 6 to 8<br> 8 to 12<br> 9 to 12
I am Lyosha [343]
So yuo simplyfly

15:20=3:4

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If 75% of a number is 255 and 20% of the same number is 68, find 95% of that<br> number.
Tanzania [10]

Answer:

75% may also be expressed as 75/100=3/4 or as 0.75 as needed.

 

Let x = the number

 

Translate:

 "if 75% of a number is 60"       means

     (75/100)  *  x      =  60            [the word "of" usually means multiply]

     (3/4) x = 60                           [reduce or just write it this way]

        x  = 60(4/3)                       [multiply both sides by  4/3]

        x = 80

Step-by-step explanation:

8 0
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