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Tema [17]
3 years ago
9

There are 5 red cars, 6 blue cars, 8 silver cars, and 4 black cars. What is the ratio of blue cars to total numbers of cars?

Mathematics
1 answer:
Inga [223]3 years ago
5 0
I think it’s b because if you add all of them up, you get 23 (total) and you just put the amount of blue cars over it so 6/23 .
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The average daily rainfall for the past week in the town of Hope Cove is normally distributed, with a mean rainfall of 2.1 inche
natita [175]

Answer:

D

Step-by-step explanation:

We calculate the z-score for each

Mathematically;

z-score = (x-mean)/SD

z1 = (1.9-2.1)/0.2 = -1

z2 = (2.3-2.1)/0.2 = 1

So the proportion we want to calculate is;

P(-1<x<1)

We use the standard score table for this ;

P(-1<x<1) = P(x<1) -P(x<-1) = 0.68269 which is approximately 68%

6 0
2 years ago
Lena purchased a prepaid phone card for $20. Long distance calls cost 21 cents a minute using this card, Lena used her card only
slega [8]

<u>Answer:</u>

37 minutes

<u>Step-by-step explanation:</u>

Lena has 20 dollars. 20 - 12.23 = 7.77

Lena has $7.77 dollars left.

We divide this by .21 to see how many minutes her call was.

7.77 ÷ .21 = 37

Rate as Brainliest and Thanks plz

5 0
3 years ago
Solve 3x + 7 &gt; -x - 9. Show each step of your work.
Kruka [31]

Answer:

x > -4

Step-by-step explanation:

Inequalities like these are solved the same way equations are solved, except when multiplying both sides you flip the less than/greater than sign:

3x + 7 > -x -9

3x + 7 - 7 > -x -9 -7     Subtract 7 from both sides

3x > -x -16

3x + x > -x -16 + x     add x to both sides

4x > -16

\frac{4x}{4} > \frac{-16}{4}     divide both sides by 4

x > -4

In this case the inequality sign did not have to be flipped since we never multiply both sides by a negative number.

3 0
2 years ago
What is the area of a parallelogram that has a base of 6 centimeters and a height of 4 millimeters?
qwelly [4]

Answer:

(A)24 cm2

Step-by-step explanation:

4 0
2 years ago
20 POINTS FOR THE FIRST PERSON TO ANSWER
MAVERICK [17]

Answer: its A

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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