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olga nikolaevna [1]
2 years ago
7

What is the value of the expression? 5(-4)-(10+5)

Mathematics
1 answer:
andrew-mc [135]2 years ago
4 0

Answer:

35

Step-by-step explanation:

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Lusia ran 3 2/3 kilometers in 1/3 of an hour. If speed is distance over time, calculate lusia's speed.
Romashka [77]
In the question, they give you the formula for speed...

speed = distance / time

They also give you the distance and the time, so all we have to do is stick them into the equation...

speed =  3 2/3 Km / 1/3 hour
speed = 3 2/3 / 1/3

To divide the fractions, first we need to convert 3 2/3 into an improper fraction

3 2/3 = 11/3

now we multiply 11/3 x the reciprocal of the divisor 1/3.  The reciprocal just means flip the numerator and denominator

speed = 11/3 x 3/1
speed = 33/3
speed = 11 Km/hour
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3 years ago
HELP meeeeee please
Rufina [12.5K]

Answer: a = 23, b = 21, c = 136

Step-by-step explanation:

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How many acute angles are in a right triangle
garik1379 [7]

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3 years ago
Kayla brought 80 packs of cat food to feed the cats outside.
Akimi4 [234]

Answer:

It's 24 packs of cat food

Step-by-step explanation:

You have to think of it as 30% of 80.

30      ?

----- = ----

100    80

Now you have to find out what is in the blank by doing 80 times 30 to find what that equals. That equals 2,400. Now you have to find what times a 100 gets you 2,400. You divide a 100 by 2,400 to get 24. There's your answer

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Find the measure of angle b.
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Step-by-step explanation:

90-51=39

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