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forsale [732]
3 years ago
15

Seven times the sum of 5 and a number amount to 91. Find the number

Mathematics
2 answers:
vova2212 [387]3 years ago
7 0

Answer:

n=8

Step-by-step explanation:


Marta_Voda [28]3 years ago
3 0

Answer:

Replace  with  

91

and simplify.

5

,

91



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You have a deck of cards and select two
scoundrel [369]

Answer:

Step-by-step explanation:

7 0
3 years ago
Nine is 4 percent of what number
Katarina [22]

Answer:

225

Step-by-step explanation:

We can model this question with:

9 = 0.04x

x represents "what number."

0.04x = 9.

Divide 0.04 from both sides

0.04x ÷ 0.04 = 9 ÷ 0.04

9 ÷ 0.04 = 225.

Therefore, 9 is 4% of 225.

5 0
3 years ago
Read 2 more answers
An urn contains 2 red marbles and 3 blue marbles. 1. One person takes two marbles at random from the urn and does not replace th
Ghella [55]

Answer:

A) The best way to picture this problem is with a probability tree, with two steps.

The first branch, the person can choose red or blue, being 2 out of five (2/5) the chances of picking a red marble and 3 out of 5 of picking a blue one.

The probabilities of the second pick depends on the first pick, because it only can choose of what it is left in the urn.

If the first pick was red marble, the probabilities of picking a red marble are 1 out of 4 (what is left of red marble out of the total marble left int the urn) and 3 out of 4 for the blue marble.

If the first pick was the blue marble, there is 2/4 of chances of picking red and 2/4 of picking blue.

B) So a person can have a red marble and a blue marble in two ways:

1) Picking the red first and the blue last

2) Picking the blue first and the red last

C) P(R&B) = 3/5 = 60%

Step-by-step explanation:

C) P(R&B) = P(RB) + P(BR) = (2/5)*(3/4) + (3/5)*(2/4) = 3/10 + 3/10 = 3/5

3 0
3 years ago
1/5 of a box of erasers and youneed to share with 3 people including yourself what fraction of the box would each person get
CaHeK987 [17]
1 1. 1
— x. — = —
4. 5. 20

1/20 is the answer
8 0
3 years ago
Marci and Levi add 113.5 + 22.41. If the whole numbers are added, the sum would be ??
AlexFokin [52]

Answer:

(the real answer would be 135.91) The numbers add (just the whole numbers) would be 135

7 0
3 years ago
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