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Genrish500 [490]
3 years ago
13

Solve for a. 1/5(25−5a)=4−a

Mathematics
1 answer:
aalyn [17]3 years ago
3 0
1/5(25-5a)=4-a
⇔5-a=4-a
<span>NO SOLUTION</span>
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(2y+9)+(3d+5)=? *simplify your answer*
netineya [11]

Answer:

2y + 3d +14\\2(y+7)+3d

Step-by-step explanation:

We remove the bracket and rearrange the numbers to add them. Only similar variables can be added together.

(2y+9)+(3d+5)\\2y+9+3d+5\\2y + 3d + 9 +5\\2y + 3d + 14\\2(y+7)+3d

7 0
2 years ago
Read 2 more answers
A track star runs two races on a certain day. The probability thathe wins the first race is 0.7, the probability that he wins th
NARA [144]

Answer:

a) 80% probability that he wins at least one race.

b) 30% probability that he wins exactly one race.

c) 20% probability that he wins neither race.

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

A is the probability that he wins the first race.

B is the probability that he wins the second race.

C is the probability that he does not win any of these races.

We have that:

A = a + (A \cap B)

In which a is the probability that he wins the first race but not the second and A \cap B is the probability that he wins both these races.

By the same logic, we have that:

B = b + (A \cap B)

The probability that he wins both races is 0.5.

This means that A \cap B = 0.5

The probability that he wins the second race is 0.6

This means that B = 0.6

B = b + (A \cap B)

0.6 = b + 0.5

b = 0.1

The probability that he wins the first race is 0.7.

This means that A = 0.6

A = a + (A \cap B)

0.7 = a + 0.5

a = 0.2

A) he wins at least one race.

This is

P = a + b + (A \cap B) = 0.2 + 0.1 + 0.5 = 0.8

There is an 80% probability that he wins at least one race.

B) he wins exactly one race.

This is

P = a + b = 0.2 + 0.1 = 0.3

There is a 30% probability that he wins exactly one race.

C) he wins neither race

Either he wins at least one race, or he wins neither. The sum of these probabilities is 100%.

From a), we have that there is an 80% probability that he wins at least one race.

So there is a 100-80 = 20% probability that he wins neither race.

6 0
3 years ago
The product of two integers is -12 and the sum is -1. What are the numbers?
kupik [55]

Answer:

+3 and -4

Step-by-step explanation:

as

+3×-4=-12

and

-4+3=-1

3 0
3 years ago
How do I solve for x?
zheka24 [161]
3.) 5x-6=0, Add 6 to either side -> 5x=6, divide each side by 5 -> x=6/5 ---- 4.) x+y/3=5, multiple each side by 3 -> x+y=15, move y to the other side -> x=-y+15
3 0
3 years ago
Read 2 more answers
Malakais family uses 648 liters of water per a week. Dylan's family uses 3 times as much water.
maxonik [38]

Answer
Multiply 648 by 3 to get for one week
Plz give me brainliest
Hope this helps
3 0
2 years ago
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