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4 years ago

13

Help me on number 19 plz.

2 answers:

bulgar [2K]4 years ago

8 0

Simply put 10 in all of the boxes. There are 5 boxes. And all those boxes equal 50, right? So for every box, there's 10 students. 10 multiplied by 5 is equal to 50.

Romashka [77]4 years ago

4 0

If the ratio is 2/3. Then each part would be 10. So 30 girls and 20 boys. I dont know if this answer is absolutely correct but this is what i think. hopefully this helps

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If integer k is equal to the sum of all even multiples of 15 between 295 and 615, what is the greatest prime factor of k?

ohaa [14]

Answer:

The greatest prime factor of k is 11.

Step-by-step explanation:

∵ LCM( 2, 15) = 30,

Thus, the even multiple of 15 must be multiple of 30,

That is, the even multiple of 15 between 295 and 615 are

300, 330, 360,..........600

Which is an AP,

Having first term, a = 300,

Common difference, d = 30,

If n be the number terms,

Last term = $a+(n-1)d$

$=300+(n-1)30$

$=270 + 30n$

$\implies 270+30n = 600\implies 30n = 330\implies n = 11$

Hence, the sum of the all even multiple of 15 from 295 to 615,

$S_{11}=\frac{11}{2}(2(300)+(11-1)30)=\frac{11}{2}(600+300)=\frac{11}{2}(900)=11\times 450$

According to the question,

$S_{11}=k$

⇒ k = 11 × 450 = 11 × 5 × 5 × 3 × 3 × 2

Hence, the greatest prime factor of k is 11.

3 0

3 years ago

If there are 4boys and 2girls in a family, what is the ratio of boys in the family to children in the family?

BARSIC [14]

Assuming the 4 girls and 2 boys are all children, the ratio of boys to toal children is 2 to 6. This can simplify to 1 to 3.
Final answer: 1 to 3

3 0

3 years ago

What is the value of x

ICE Princess25 [194]

Answer:

124°

Step-by-step explanation:

Step 1:

72° + 52° = x Remote Interior ∠'s

Step 2:

124° = x Add

Answer:

x = 124°

Hope This Helps :)

7 0

4 years ago

Read 2 more answers

Ana and Belinda both start down a trail at the same time. Belinda rides her bike at a speed of 10 miles per hour. It takes Belin

dolphi86 [110]

If in one hour Belinda can go 10 miles that means in 30 minutes she can go 5 miles. 60/2=30 10/2=5

If she can go 5 miles is 30 minutes than by doing some simple math she must be able to go 2.5 miles in 15 mins. 30/2=15 5/2=2.5

Meaning that when you add 30+15 you get 45 and when you add the distance she can go in each amount of given time 5+2.5 you get 7.5

So the trail has to be 7.5 miles long

6 0

3 years ago

I need to know the answer

patriot [66]

Answer: I thik its c) -3 not sure tho

Step-by-step explanation:

- 6 from 3 and the ÷ that by 8 n 3

6 0

3 years ago