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Alex Ar [27]
3 years ago
6

there is 4/5 lb of sand in science supplies. if one scoop of sand weighs 1/20 of a lb how many scoops of sand can maria get from

the class supplies?
Mathematics
1 answer:
tatuchka [14]3 years ago
5 0
We want to divide whole sand into scoops, so we have to divide 4/5 by 1/20. Lets do this

\frac{ \frac{4}{5} }{ \frac{1}{20} }
We know that if we want to divide 2 fraction we can multiply first by inverse of second fraction instead of dividing.,so:
\frac{ \frac{4}{5} }{ \frac{1}{20} }
\frac{4}{5}* \frac{20}{1}= \frac{4*20}{5*1}   = \frac{80}{5}= 16 scoops - its our result.
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Write as a fraction or mixed number in simplest form. Show all work please
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4 0
2 years ago
Ted needs an average of at least 70 on his three history test he has scored already 85 and 60 on two test what is the minimum gr
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So average=(total of scores)/(number of tests)
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at least is represented as greater than or equal to or the sign (<u>></u>)
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since we have 3 tests, we have to have 3 scores so
70<u>></u>(x+y+z)/3
he scored 85 and 60
70<u>></u>(x+85+60)/3 (doesn't matter which to subsitute)
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4 0
3 years ago
Please help ASAP. Thanks so much.
MAVERICK [17]

Answer:

B. 3

Step-by-step explanation:

To find the value of c, substitute the x and y values of the given point into x and y of the equation, then isolate c. Since that given point is (2,5), substitute 2 for x and 5 for y:

(5) = -2(2)^2+8(2)-c\\5 = -2(4)+16-c\\5 = -8 + 16 - c \\5 = 8 -c\\-3 = -c\\c = 3

Thus, c = 3.

5 0
2 years ago
(simplify the expression) 2x7b
Lapatulllka [165]

Answer:

14b

Step-by-step explanation:

2×7=14

Just put the "b" after 14

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2 years ago
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fredd [130]
Answer 18.19

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17x(1.07)=18.19
8 0
2 years ago
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