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katrin2010 [14]
3 years ago
15

Explain how to use the distributive property to find an expression that is equivalent to 20+10

Mathematics
2 answers:
nordsb [41]3 years ago
5 0

Answer: 2(10+5)

Step-by-step explanation: half of 20 is 10. half of 10 is five and i put them both in parentheses. outside the parenthesis i placed 2 so it is multiplied to the inner set of numbers.

skelet666 [1.2K]3 years ago
3 0
Correct answer- 2(10+5) :)
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Pls, I need help! 20 points
Montano1993 [528]

Answer:

5, 5, 10, 15

Step-by-step explanation:

He spent 1/4 of 20 which is 5 on food, 1/2 of 20 which is 10 on music, so if you add those you get 15. 20-15 is equal to 5.

8 0
3 years ago
In A certain chemical, the ratio of zinc to copper is 3 to 19. A jar of the chemical contains 836 grams of copper. How many gram
Elis [28]

Answer:

The jar contains 132 grams of zinc

Step-by-step explanation:

zinc to copper = 3 : 19

New equivalent weights

zinc to copper = x : 836

Now, let us solve for x as follows

\frac{zinc}{copper}  = \frac{3}{19} = \frac{x}{836} \\\\cross-multiplying\\3 \times\ 836 = 19 \times\ x\\2508 = 19x\\x = \frac{2508}{19}\\x =  132

the jar contains 132 grams of zinc

To check if the answer is accurate, the answer gotten when the weight of zinc is divided by copper will be the same for both the old and new ratios:

old ratio: 3 ÷ 19 =  0.158

new ratio: 132 ÷ 836 = 0.158

3 0
2 years ago
What is 712,156 written in expanded form?
lana [24]

Answer:

D

Step-by-step explanation:

You just look at the place values

PLZ vote my answer brainliest

7 0
3 years ago
Read 2 more answers
Please help I dont understand
riadik2000 [5.3K]

Answer:

2.1

Step-by-step explanation:

By the Law of Cosines,

a² = 5² + 6² - 2(5)(6)cos(20°)

a = sqrt(5² + 6² - 2(5)(6)cos(20°)), which is about 2.1

7 0
1 year ago
Find the area of a sector with a central angle of 133 degrees and a radius of 13.9 millimeters. Round to the nearest tenth.
Sloan [31]
The answer is A.
First, you change the degrees to radians.

133(pi/180)= 2.3212879051524583373085087220899 (long number)

Then you just plug that into the formula!

(r^2*theta)/2

(13.9^2 * 2.3212879051524583373085087220899) / 2 = 224.24801807725323767568848509749
5 0
3 years ago
Read 2 more answers
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