Mathematics High School

At a country concert, the ratio of number of boys to the number of girls is 2:7. If there are 250 more girls than boys, how many boys are at the concert?!

PLSSSSSSSS I NEED HELP ASAP PRETTY SURE THIS IS BEING GRADED!! GIVING BRAINLIEST AND 40 POINTS!!

Answers

Answer 1

Answer:

100 boys at the concert

Step-by-step explanation:

When changing the ratio between the number of boys to the number of girls, it always has to be equivalent to the original ratio 2:7

So, convert the ratio 2:7 to a different ratio, but it still has to be equivalent to the ratio 2:7. By doing that, multiply both sides of the 2:7 ratio by 50:

  2   :   7

×50   ×50

To get:

100:350  ⇒  This ratio means that the ratio between the number of boys to the number of girls is now 100:350, but that’s okay to have because it’s still equivalent to the original 2:7 ratio.

So, using the new ratio 100:350, this means that there are 100 boys at the concert and 350 girls at the concert, and 350 is 250 more than 100 which proves what the question is asking. So there are 100 boys at the concert.

Answer: 100 boys at the concert

I hope you understand and that this helps with your question! :)

Related Questions

Please help!!

Use the given vectors to find the indicated quantities.
u =(5, - 2), v =(0, 1), w =(-1, -3)
(a) (u • v)w (b) 5u • V

Answers

Part (a)

Lets say we had the two general vectors

u = (a,b)

v = (c,d)

The dot product is

u dot v = a*c + b*d

-------------------

Apply that rule to these specific vectors

u = (5, -2)

v = (0, 1)

So we get

u dot v = 5*0 + (-2)*1

u dot v = 0 - 2

u dot v = -2

Therefore,

(u dot v)*w = -2*(-1, -3)

(u dot v)*w = ( -2*(-1), -2(-3) )

(u dot v)*w = (2, 6)

Answer:  (2, 6)

=============================================

Part (b)

u = (5, -2)

5u = 5*(5, -2)

5u = (5*5, 5*(-2))

5u = (25, -10)

5u dot v = (25, -10) dot (0,1)

5u dot v = 25*0 + (-10)*1

5u dot v = 0 - 10

5u dot v = -10

Answer: -10

The two pentagons shown are similar.
8 cm
879
879
9 cm
8 cm
16 cm
3 cm
6 cm
not drawn to scale
What is the value of x?
O A. 6 cm
B. 9 cm
ОО
C. 12 cm
D. 14 cm

Answers

The answer is D but correct me if I’m wrong

Can someone please explain how to do this?
I’m stuck and I need your help :(

Answers

Answer:

9 power 3 minus 3

so 9 power 0

Answer:

9^2

Step-by-step explanation:

Subtract the bottoms exponent from the top exponent. If you see no exponent there is always a one.

A car is traveling at a steady speed. It travels 1 3/4 miles in 2 1/3 minutes. How far will it travel in ​? In 1 hour​?

Answers

Answer:

45 miles.

Step-by-step explanation:

Ok, so it goes 1.75 (1 3/4) miles in 2 minutes and 20 seconds, or 140 seconds. Divide 1.75 miles by 140 and you get 0.0125 miles per second, or 0.75 (3/4) miles per minute. Multiply 0.75 by 60 minutes and you get 45 miles.

!!!!!! ’ ... like Ik there is smart ppl around the world who knows these

Answers

Answer:

into a pyramid i think...

A carpenter measures the diagonals of a piece of wood. In rectangle EFGH, EJ=26 in. Find FH.

Answers

Answer:

36

Step-by-step explanation:

Well duh

You are in kindergarten!

i need help i don’t understand what it means or what it is asking for

Answers

Answer:

its D btw

Step-by-step explanation:

Halp plzzzz!! I will give Brainliest!!!

sry if u cant see

Answers

it would be C, D, and E. when there is no line marked under the less than or greater than sign, it’ll be open circle

PLEASE HELP FAST MAKE SURE YOU READ IT CORRECT I WILL GOVE BRAINLIST AND EXTRA POINTS PLEASE HELP!

Answers

Answer:

f(5) = 3

Step-by-step explanation:

f(x) is the y coordinate at x.

At x = 5, y = 3, so f(5) = 3.

Which step contains an error?
O step 2
O step 4
O step 6
O step 8

Answers

Answer:

C

Step-by-step explanation:

Step 6

Math proportions..............

Answers

9/x = 25/100

cross multiple to get:

25x = 900

then divide to simply:

x=36

A Family spent a total of $73.75 on movie tickets and snacks. Each ticket cost $12.50, and each snack cost $4.75. If the family bought a total of 9 tickets and snacks, How many of each did they buy?

Answers

Answer:

4 Tickets and 5 Snacks

Step-by-step explanation:

Answer:

The family bought 4 tickets and 5 snacks.

Step-by-step explanation:

$12.50 x 4 tickets = 50

$4.75 x 5 snacks = 23.75

$50 + $23.75 = $73.75

I CANT FIGURE THIS OUT!! WHATS 1+1! I WILL GIVE BRAINLIEST IF U KNOW THIS

Answers

OMG THIS IS SO DIFFICULT, BUT I THINK THE ANSWER IS 3

What is -2(g+5) please help :)

Answers

Answer:

-2g -10

Step-by-step explanation:

On simplifing this expression we get,

-2(g+5)

=> -2g + (-10)

=> -2g - 10

If my answer helped, kindly mark me as the brainliest!!

Thanks!!

Answer:

-2g-10

Step-by-step explanation:

-2(g+5)

Use the distributive property to simplify the equation

(-2*g)+(5*-2)

(-2g)+(-10)

-2g-10

Hope this helps. Have a nice day. May it be filled with joy ad happiness. Please, be safe and wash your hands. Happy Holidays.

I need to know the answer quick

Answers

Answer:

v = 13

Step-by-step explanation:

Truly hope I helped fast enough:).

(19) Calculate $ 328.67 as a percentage of $ 150
O
219%
O
209%
199%
189%​

Answers

Answer:

219%

Step-by-step explanation:

Answer:

219%

Step-by-step explanation:

Since $300 is double the price of $150, it is safe to say that it is over 200% which comes down to the first two answers 209% and 219%.  Divide $328.67 by $150 to get to the number which is around 2.19113333, multiply by 100 to get the answer.

Pleaseeeee help me anyone !!!!!!!!!!!! Will mark Brianliest answer correctly

Answers

Answer:

x = 6√7

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Trigonometry

[Right Triangles Only] Pythagorean Theorem: a² + b² = c²

Step-by-step explanation:

Step 1: Define

We are given a right triangle. We can use PT to solve the missing length.

Step 2: Identify Variables

Leg a = √27

Leg b = 15

Hypotenuse c = x

Step 3: Solve for x

Substitute [PT]:                    (√27)² + 15² = x²Exponents:                          27 + 225 = x²Add:                                     252 = x²Isolate x:                              6√7 = xRewrite:                               x = 6√7

Please help me...................thanks

Answers

Answer:

C

Step-by-step explanation:

ǟռֆաɛʀ: C


´ռօ ɛxքʟǟɨռᏆɨօռ

help me l,ll give you brainest

Answers

Answer:

Step-by-step explanation:

he did the question wrong completely, so, check #4, #2, and #3

Answer:

the last three choices

ALERT NEED HELP PLEASE ASAP ​

Answers

Because to find the equation of the line is difference in x/difference in y. It’d be:

-3/2 = -1.5
And the line crosses at the y-intercept at 1 so the answer would be:
y = -1.5x +1

Answer this plz I’ll mark brainliest:)

Answers

✨1. B 2.D try this I hope it helps!✨

Answer:

7.5

Step-by-step explanation:

7.5 is the smallest. 7.51 is bigger by 0.01, 7.501 is bigger by 0.001 and 7.5 with a dot on top means that the number 5 repeats itself indefinately after the comma so it is like if we wrote 7.55555555 and the 5 kept going on forever

Anthony has 15 coins, all of which are quarters and dimes. In all, they're worth $3.60. How many of each kind of coin does Anthony have?

Answers

Answer:

1 Dime

14 Quarters

Step-by-step explanation:

d + q = 15

0.10d + 0.25q = 3.60

d = 15 - q

0.10d + 0.25q = 3.60

0.10(15 - q) + 0.25q = 3.60

1.5 - 0.10q + 0.25q = 3.60

0.15q = 3.60 - 1.5

0.15q = 2.1

0.15q/0.15 = 2.1/0.15

q = 14

d = 15 - q

d = 15 - 14

d = 1

What is the LCF of 60 and 10 ?

Answers

Do you mean LCM

If you just want to know what is the least common multiple of 10 and 60, it is 60

Answer:

the lowest common factor is 5

Step-by-step explanation

5 can go into both 60 and 10, and thats the lowest that can go into both numbers because 5 times 2 is equal to 10 and 5 times 12 is equal to 60. hope this helps :)

A store pays $70 for a kitchen table. The store marks up the price by 45% so they can make a profit.
What is the amount of the mark-up?
$

Answers

Answer:

$108.75

Step-by-step explanation:

math and stuff

Need help !

Which equation could be represented by the number line?

Answers

Answer:

I think its b

Step-by-step explanation:

this is for the brainlist winner

Answers

Thanks for the points!

Evaluate f(x)=x-5 when x=-5,x=0,and x=5

Answers

Answer:

f(x) = x - 5

f(-5) = -5 - 5

= -10

f(0) = 0 - 5

= -5

f(5) = 5 - 5

= 5

Hope this helps!

What is the value of X I’ll give brainlist please someone help me

Answers

Answer:

69.333 or 208/3

Is the following relation a function?

Answers

Answer:

may it is integer or mines relationship

Answer:

yes

Step-by-step explanation:

For the relation to be a function each value of x must map to exactly one unique value of y.

This is the case here thus the relation is a function

If you are seeing this, This is a simple sign to calm down and relax. You have been working very hard and your burned out. Take a break from the stress of trying to find your answers. Its okay. Ask your questions. Take a break. Breathe. You will get your assignments done. You will pass your assignments. You will get good grades. Just relax and ask me your questions. ​

Answers

Answer:

Dang they deleted my last answer

Step-by-step explanation:

I wonder why people ACTUALLY report stuff like this....

Answer:

thanks

Step-by-step explanation:

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