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Stolb23 [73]
3 years ago
12

Kate scored 85,78,72, and 81 on 4 math tests. What score does she need on the fifth test to have at least an 80 average?

Mathematics
1 answer:
Elan Coil [88]3 years ago
4 0

I am not good in this kind of question so maybe 84?

suppose the full marks for each of them is 100 so for 5 of them it will be 500 cause if you if you multiply 100 full marks by 5 it will be 500

so the answer to this question is maybe 84?

cause if you add all of them with 84 the outcome will be 400 and if you divide the 400 by 5 it will be 80

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In the figure below, KL=9 and JK=4. Find JL.
Drupady [299]

Answer:

JL → 13

Explanation:

JL → JK + KL

JL → 4 + 9

JL → 13

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Simplify the expression: <br> (8+-9)(9+-8)
Paha777 [63]

Answer:

-1

Step-by-step explanation:

(8 + -9)(9 + -8)

A negative times a positive is a negative.

8 + -9

+- = -

8 - 9

8 - 9 = -1

(-1)(9 + -8)

9 + -8

+- = -

9 - 8

9 - 8 = 1

(-1)(1)

Now, we multiply

Remember, a negative times a positive equals a negative.

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What is the solution to the equation? 13 3/4 +x= 7 1/4
Butoxors [25]

Answer:

x = 6\frac{1}{2}

Step-by-step explanation:

13\frac{3}{4}+x=7\frac{1}{4}

(subtract 13\frac{3}{4} from both sides)

x=6\frac{2}{4} or 6\frac{1}{2}

4 0
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Question Which ordered pairs are solutions to the equation 2x+10y=12? Select all that apply. Select all that apply: (7,−2) (−5,−
AveGali [126]

Answer:

C and D

Step-by-step explanation:

To determine which pairs are solutions, substitute the coordinates into the left side of the equation and if equal to the right side then they are solutions.

(7, - 2)

2(7) + 10(- 2) = 14 - 20 = - 6 ≠ 12 → (7, - 2) is not a solution

(- 5, - 4)

2(- 5) + 10(- 4) = - 10 - 40 = - 50 ≠ 12 → (- 5, - 4) is not a solution

(4, \frac{2}{5} )

2(4) + 10(\frac{2}{5}) = 8 + 4 = 12 → hence solution

(- 5, \frac{11}{5} )

2(- 5) + 10( \frac{11}{5}) = - 10 + 22 = 12 → hence solution

8 0
3 years ago
Erin has a rope that is 3 yards long.
Scorpion4ik [409]

Answer:

12 pieces

Step-by-step explanation:

3/0.25 = 12 pieces

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