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natima [27]
3 years ago
7

Help pleaseeeee????????

Mathematics
2 answers:
rodikova [14]3 years ago
3 0
Answer is C sir......
Alexeev081 [22]3 years ago
3 0
The answer to this question is B.
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SOLVE EACH SYSTEM USING SUBSTITUTION
NNADVOKAT [17]
1. since the equations equal each other 
2x+19=x+7
-x        -x
x+19=7
  -19  -19
x= -12
sub into y= x+7
y= -12+7
y= -5

2. x+2y=-7
<span>x+y+23=0
i don't know what the second equation is equal to, i'll assume 0

2y=x-7
y=1/2x-7/2
sub this into x+y+23=0
x+1/2x-7/2+23=0
3/2x+39/2=0
       -39/2   -39/2
3/2x= -39/2
x=-39/2 / 3/2
x= -13
sub into y=1/2x-7/2
y=1/2(-13)-7/2
y= -10

3. </span>x+5y=2
<span>x=-4y+5
</span>sub x=-4y+5 into x+5y=2
-4y+5+5y=2
y+5=2
  -5  -5
y= -3
sub y =-3 into x =-4y+5
x=-4(-3)+5
x= 17

4. 3x+y=9
<span>y=-5x+9
</span>sub -5x+9 into 3x+y=9
3x+(-5x+9)=9
3x-5x+9=9
-2x+9=9
     -9  -9
-2x=0
x=0
sub into y=-5x+9
y=-5(0)+9
y=9

3 0
3 years ago
184500 $ are to be divided between 2 people. One person has 80% of what the other person has. How much does each one receive in
Annette [7]

Given:

$184500 are to be divided between 2 people.

One person has 80% of what the other person has.

To find:

The amount each one receive in $.

Solution:

Let $x be the amount received by first person. Then,

Amount received by the second person = 80% of x

                                                                   = 0.80x

Total amount = Amount received by first person + by second person

                      =x+0.80x

                      =1.80x

Total amount is 184500. So,

1.80x=184500

x=\dfrac{184500}{1.80}

x=102500

So, the amount received by the first person is $102,500.

0.80x=0.80\times 102500

0.80x=82000

So, the amount received by the second person is $82,000.

6 0
3 years ago
How much of the circle is shaded 1/4+3/7
Snezhnost [94]
I hope this helps you



1/4+3/7


7/7.4+3.4/7.4


7/28+12/28

19/28
4 0
3 years ago
What is 24xe if that's even a question i don't know if you know fell free to answer
Mkey [24]
I don’t really understand the question
7 0
3 years ago
Read 2 more answers
You are choosing a movie from your friends movie collection. You can choose 1 of 4 comedies, 1 of 5 dramas, or 1 of 3 classics.
Marizza181 [45]
(4 comedies) * (5 dramas) * (3 classics) => 4*5*3 = 60 DIFFERENT WAYS.

7 0
3 years ago
Read 2 more answers
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