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LenaWriter [7]
3 years ago
12

From a barrel of colored marbles, you randomly select 7 blue, 5 yellow, 8 red, 4 green, and 6 purple marbles.

Mathematics
2 answers:
Phoenix [80]3 years ago
3 0
The first answer is b. The second answer is c.
Wewaii [24]3 years ago
3 0
1) b.5/6

2) c.1/3

hope this helps
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In Jack's class, 7 out of 25 students have hazel eyes. What percent of the class has hazel eyes?
denis23 [38]
You're going to set up a proportion. % over 100 = is over of. You're looking for the percent so that's your x. X over 100=7 over 25. Cross multiply to get 25x=700. Divide both sides by 25 and your answer is 28%
4 0
3 years ago
The midpoint of AB is M(0, 3) If the coordinates of A are (4, - 1) , what are the coordinates of B?
Harlamova29_29 [7]

-4;4

XB=0*2-4

YB=3*2-(-1)

3 0
3 years ago
Find the slope of the line 4x-8y=15
Arisa [49]

Answer:

-1 \frac{7}{8}

Step-by-step explanation:

4x-8y=15

4x-8y-4x=15-4x

-8y=15-4x

-8y/-8=15-4x/-8

y=-1 7/8+1/2x

slope is -1 7/8

4 0
3 years ago
A group of preschoolers has 30 boys and 13 girls what is the ratio of boys to all children? ​
vekshin1

A group of preschoolers has 30 boys and 13 girls then the ratio of boys to all children would be 30:43.

What is a ratio?

A ratio in mathematics shows how many times one number contains another. For example, if a bowl of fruit contains eight oranges and six lemons, the orange-to-lemon ratio is eight to six. Similarly, the lemon-to-orange ratio is 6:8, and the orange-to-total fruit ratio is 8:14.

A group of preschoolers has 30 boys and 13 girls.

Total children will be = 30 + 13 = 43

          Ratio = number of boys/total children

                  = 30/43.

Hence, if A group of preschoolers has 30 boys and 13 girls then the ratio of boys to all children would be 30:43.

To learn more about the ratio, visit:

brainly.com/question/12024093

#SPJ1  

7 0
1 year ago
50 POINTS! I MARK BRAINLEST AND SAY THANKS!
Phantasy [73]
Y *x =20

y +x =9

rewrite 1st eq. as y = 20/x

subsituute that into 2nd eq.

20/x +x =9

multiply each term by X

20 +x^2 = 9x
 subtract 9x from each side:

x^2 - 9x +20 = 0

now factor:

(x-5) (x-4) = 0

solve for x
5-5 = 0
 4-4 = 0

so X can be 4 or 5

replace x into equations and solve for Y

 so when X = 4, Y = 5
 When X = 5, Y = 4

x= 5,4
y = 4,5



5 0
3 years ago
Read 2 more answers
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