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3 years ago

30 red marbles is 40% of ____ marbles

Mathematics

1 answer:

AlekseyPX3 years ago

7 0

Answer:

Step-by-step explanation:

Turn the percentage into a decimal.

40% -> 0.4

Divide.

30 / 0.4 = 75

Best of Luck!

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When angles complementary,the sum of their mesures is 90 degrees. Two complementary angles have measures of 2x-10 degrees and 3x

kykrilka [37]

Answer:

34 degrees and 56 degrees

Step-by-step explanation:

As the two given angles are complementary,

2x-10+3x-10=90

5x-20=90

5x=90+20=110

x=110/5=22

x=22

Now each angle

2x-10=2*22-10=34 degrees

and

3x-10=3*22-10= 56 degrees

4 0

4 years ago

(6c2) * (10c6) * (3c2)

bezimeni [28]

<span>(6c2) * (10c6) * (3c2)
Multiply
60c8 * 3c2
Multiply again
Final Answer: 180c10</span>

5 0

3 years ago

Your towns public library is building a new wheelchair ramp to its entrance. By law the maximum angle of incline for the ramp is

Mrrafil [7]

For this case we can model the problem as a rectangle triangle.
We have the angle between the base and the hypotenuse of the triangle.
We have the height of the triangle.
We want to calculate the base of the triangle.
For this, we use the following trigonometric relationship:
$tan (4.76) = 2 / x
$
Clearing x we have:
$x = 2 / tan (4.76)

 x = 24.02 feet$
Answer:
the shortest horizontal distance that the ramp can span is:
x = 24.02 feet

6 0

3 years ago

Read 2 more answers

What's the total surface area of a covered box with a length of 4 ft, a width of 3 ft, and a height of 6 ft?

Semmy [17]

Answer: 108 square feet

===============================================

Work Shown:

L = 4 = length

W = 3 = width

H = 6 = height

SA = surface area of the box

SA = 2*(LW + LH + WH)

SA = 2*(4*3 + 4*6 + 3*6)

SA = 108

4 0

2 years ago

Find the difference.

Vsevolod [243]

$5.\\12\dfrac{3}{10}-7\dfrac{7}{10}=11\dfrac{10+3}{10}-7\dfrac{7}{10}=11\dfrac{13}{10}-7\dfrac{7}{10}=4\dfrac{6}{10}=4\dfrac{6:2}{10:2}=\boxed{5\dfrac{3}{5}}\\\\11-7=4\\\\\dfrac{13}{10}-\dfrac{7}{10}=\dfrac{13-7}{10}=\dfrac{6}{10}\\\\6.\\8\dfrac{1}{6}-3\dfrac{5}{6}=7\dfrac{6+1}{6}-3\dfrac{5}{6}=7\dfrac{7}{6}-3\dfrac{5}{6}=(7-3)+\dfrac{7-5}{6}=4\dfrac{2}{6}=4\dfrac{2:2}{6:2}=\boxed{4\dfrac{1}{3}}$

$9.\\7\dfrac{1}{6}-2\dfrac{5}{6}=6\dfrac{6+1}{6}-2\dfrac{5}{6}=6\dfrac{7}{6}-2\dfrac{5}{6}=(6-2)+\dfrac{7-5}{6}=4\dfrac{2}{6}=\boxed{4\dfrac{1}{3}}\\\\10.\\9\dfrac{3}{12}-4\dfrac{7}{12}=8\dfrac{12+3}{12}-4\dfrac{7}{12}=8\dfrac{15}{12}-4\dfrac{7}{12}=(8-4)+\dfrac{15-7}{12}=4\dfrac{8}{12}\\\\=4\dfrac{8:4}{12:4}=\boxed{4\dfrac{2}{3}}$

5 0

3 years ago