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Anettt [7]
3 years ago
7

There are four times as many girls in a chemistry class as there are boys. if there are 45 students in the class, how many boys

are in the class? type your answer in the box below.
Mathematics
1 answer:
puteri [66]3 years ago
4 0
In order to determine the number of boys in the class, first, we set-up an algebraic equation. Let x = number of boys in the class. The equation is then: x + 4x = 45. This is because the number of girls is 4 times greater than the number of boys. After solving the algebraic equation, it is then determined that there are 9 boys in the Chemistry class.   
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Ghella [55]

x should equal -2 and y should equal -3 to solve this i multiplied the first equation by 2 then got rid of the 4y and -4y then i added the 14x to the 9 equaling 23x and added the -40 to the -6 which became 23x=-46 i solved this getting -s for x, then i plugged that into the equations to get y which was -3

8 0
3 years ago
Which equation has no solution?
Dmitry [639]

Answer:

A for sure

Step-by-step explanation:

4 0
3 years ago
Pls help it is too hard​
ozzi
U have to substitute in the values of x to get the values of y

answers in order from left to right:
4.5, 4, 3.5, 3, 2.5, 2

ex of solving process:
x+2y=7
(-2)+2y=7
2y=9
y=4.5
3 0
2 years ago
Read 2 more answers
8. A
Aleksandr [31]

Answer:

9.C DEFAULT

Step-by-step explanation:

Unta makatabang ko sa inyuha kay mark this to brainliest

4 0
3 years ago
How many solutions are there to the equation below?
Studentka2010 [4]
No solution

3x+5+4x=7x+9
7x+5=7x+9
-7x -7x

you’re left with no x.. so no solution
6 0
2 years ago
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