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3 years ago

Plis help with this. - - -

Mathematics

1 answer:

madreJ [45]3 years ago

4 0

Answer: 16

Step-by-step explanation:

multiplying by negative exponents can be a little tricky. So (1/4x)^-2 becomes 16/x^2 = __/x^2 so the missing number is 16

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Sandra starts to pack cubes with side length inch into Rectangular Prism A. Then, she measures the dimensions of Rectangular Pri

notsponge [240]

Answer:

A holds more
A has greater volume
24 cubes

Step-by-step explanation:

In terms of cube size, the dimensions of prism A are ...

3 cubes high by 6 cubes wide by 4 cubes deep

The dimensions of prism B are ...

3 cubes high by 8 cubes wide by 2 cubes deep

The volume of each prism (in cubes) is the product of these dimensions:

Va = 3×6×4 = 72 . . . cubes

Vb = 3×8×2 = 48 . . . cubes

(a) Prism A holds more cubes

(b) Prism A has a larger volume (which is why it holds more cubes)

(c) The difference in volumes is ...

72 cubes - 48 cubes = 24 cubes

4 0

3 years ago

Your third-grade classroom has 32 boys and girls. Two-thirds of the boys and three-fourths of the girls are going on a field tri

adelina 88 [10]

Answer: The ratio of boys to girls would be 3 : 5 .

Step-by-step explanation:

Since we have given that

Number of boys and girls = 32

Fraction of boys are going on a field trip = $\dfrac{2}{3}$

Fraction of girls are going on a field trip = $\dfrac{3}{4}$

Number of children left = 9

Let the number of boys be 'b'.

Let the number of girls be 'g'.

According to question, it becomes ,

$b+g=32------------(1)\\\\32-9=\dfrac{2}{3}b+\dfrac{3}{4}g\\\\23=\dfrac{2b}{3}+\dfrac{3g}{4}-------------(2)$

From eq(1), we get that g = 32-b

So, it becomes,

$\dfrac{2}{3}b+\dfrac{3}{4}(32-b)=23\\\\\dfrac{2}{3}b+24-\dfrac{3}{4}b=23\\\\\dfrac{2}{3}b-\dfrac{3}{4}b=23-24=-1\\\\\dfrac{8b-9b}{12}=-1\\\\\dfrac{-b}{12}=-1\\\\b=-1\times -12\\\\b=12$

so, number of girls would be 32 - b = 32 - 12 = 20

So, Ratio of boys to girls in class would be 12 : 20 = 3 : 5.

Therefore, the ratio of boys to girls would be 3 : 5 .

7 0

4 years ago

The area of the Mojave desert is 25,000 square miles. A scale drawing of the Mojave

padilas [110]

Answer:Given that the area of the mojave desert is 25,000 square miles and a scale drawing of the mojave desert has an area of 10 square inches.

The scale of the map is given by

Therefore, the scale of the drawing is 50 : 1.

Step-by-step explanation:

8 0

4 years ago

the bottom of zeyda's jewelry box is a rectangle with length 5 3/8 inches and width 3 1/4 inches. What is the area of tge bottom

nadya68 [22]

Well you could do 5 3/8 plus 3 1/4 and your denominator 4 can become a 8 so multiply 4x2 to get 8 and 2x1 to get 3 2/8 and add that to 5 3/8 to get the sum of 8 7/8

4 0

3 years ago

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The 30 minute lunch period for Grade2 starts at quarter past twelve. At what time does it end?

Tom [10]

12:45. Quarter past twelve is 15 minutes and 15 + 30 = 45. Hence, you get 12:45 as your time.

6 0

3 years ago

Read 2 more answers