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Orlov [11]
3 years ago
9

Just question 7 thanks

Mathematics
1 answer:
ad-work [718]3 years ago
5 0
Let x be the number of boys, the number of girls will be 200-x

Number of boys with blue eyes x/3
Number of girls with blue eyes (200-x)/4
ll blue eyes ==> x/3 + (200-x)/4 = 57
Reduce to same denominator & solve for x
(4x + 600 - 3x)/12 = 681/12
x=81, the total number of boys & girls200-81 119

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In the Jefferson Middle School chorus, 60% of the members are girls. If there are 45 girls in chorus what is the total number of
PtichkaEL [24]
There are 75 chorus members.
4 0
3 years ago
Sanjay has £356.54 in his bank account. He spends £595.99 on a new mountain bike. What is his new bank balance?
Vaselesa [24]

your answer would be -239.45.

356.54

-595.99

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

-239.45

3 0
3 years ago
3x+y=115x-y=21 Directions: Solve each system of equations by elimination. Clearly identify your solution.
olchik [2.2K]

To solve, we will follow the steps below:

3x+y=11 --------------------------(1)



5x-y=21 ------------------------------(2)

since y have the same coefficient, we can eliminate it directly by adding equation (1) and (2)

adding equation (1) and (2) will result;

8x =32

divide both-side of the equation by 8

x = 4

We move on to eliminate x and then solve for y

To eliminate x, we have to make sure the coefficient of the two equations are the same.

We can achieve this by multiplying through equation (1) by 5 and equation (2) by 3

The result will be;

15x + 5y = 55 ----------------------------(3)

15x - 3y =63 --------------------------------(4)

subtract equation (4) from equation(3)

8y = -8

divide both-side of the equation by 8

y = -1

8 0
1 year ago
Solve: 3 x (3 + 12/3)-4=<br>​
Zarrin [17]

Answer:

I get 17.

Step-by-step explanation:

Reduce the fraction:

3 ( 3 + 4 ) - 4

Add the numbers:

3 x 7 - 4

Multiply the numbers:

21 - 4

Subtract the numbers:

17

5 0
3 years ago
Read 2 more answers
What's the numerator for the following rational<br> expression?<br> X/y + 3/y= ?/y
Fittoniya [83]

Answer:

x + 3

Step-by-step explanation:

Since we have a common denominator, we can just simply combine the numerator which is just x+3.

7 0
3 years ago
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