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RoseWind [281]
3 years ago
13

Simplify the expression below. show your work. -(-7y +12)=7y

Mathematics
1 answer:
AnnyKZ [126]3 years ago
6 0
-(-7y+12) \\\\ =7y-12
You might be interested in
Maria and farida has 250 beads altogether. After Maria used 18 beads to make a bracket and farida gave away 2/5 of her beads, th
Elenna [48]

Answer:

Maria had 105 beads at first.

Step-by-step explanation:

Let number of beads Maria have be x.

Let number of beads Farida have be y.

Given:

Maria and Farida has 250 beads altogether.

Hence equation is represented as;

x+y =250 \ \ \ \ equation \ 1

Also Given:

Maria used 18 beads to make a bracket.

hence bead left with maria = x-18

farida gave away 2/5 of her beads.

Hence beads left with Farida = y - \frac{2}{5}y= \frac{5y}{5}-\frac{2y}{5}=\frac{5y-2y}{5}=\frac{3y}{5}

Also they have the same number of beads left.

bead left with maria = beads left with Farida

x-18= \frac{3y}{5}\\5(x-18)=3y\\5x-90=3y\\5x-3y =90 \ \ \ \ equation \ 2

Now Multiplying equation 1 with 3 we get;

3(x+y)=3\times250 = 3x+3y = 750 \ \ \ \ equation \ 3

Now adding equation 2 by equation 3 we get;

(5x-3y)+(3x+3y) = 750+90\\5x-3y+3x+3y = 840\\8x=840\\x=\frac{840}{8}=105

we know the value of x = 105

hence substituting value of x in equation 1 we get;

105+y=250\\y=250-105 =145

Maria had 105 beads and Farida had 145 beads at first.

Final Answer: Maria had 105 beads at first.

7 0
3 years ago
Which side and angle is this?
MrMuchimi
That is a right angle. :)))
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3 years ago
Plssssdsm helpppppppppppppp
zhuklara [117]
The y intercept is -2. Remember when x is substituted as 0, you can find the y intercept
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4 years ago
Suppose that y varies directly with x and y=10 when x=8. What is x when y=30? Be sure to simplify your answer.
Naddik [55]
It would be (x) 8*3=24 since (y)10*3=30

so x=24

hope this helps!
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4 years ago
What is the end behavior of f(x)?
sdas [7]
The answer is 3.x—00,y__00
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