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lbvjy [14]
2 years ago
10

I need help on this, will someone try and help me out? PLEASE

Mathematics
2 answers:
sattari [20]2 years ago
7 0
Step 1.) Multiply both sides of the equation by -6

step 2.) Sum the equations vertically to eliminate at least one variable

step 3.) Divide both sides of the equation by

step 4.) Substitute the given value of into the equation x - 2y = 10

step 5.) Solve the equation for x

step 6.) The possible solution of the system is the ordered pair (x , y)

step 7.) Check if the given ordered pair is the solution of the system of equations

step 8.) Simplify the equalities

step 9.) Since all of the equalities are true, the ordered pair is the solution of the system


So your answer would end up being (40/13 , -45/13) !! Hope that helps you out :D !!
kumpel [21]2 years ago
7 0

Answer:

x=4 y=-3

Step-by-step explanation:

I will solve your system by substitution.

(You can also solve this system by elimination.)

x−2y=10 ; 6x+3y=15

Step: Solve x −2y= 10for x:

<em>x − 2y + 2y = 10 + 2y</em><em> </em>(Add 2y to both sides)

<em>x=2y+10</em>

Step: Substitute 2y+10 forx in 6x+3y=15:

<em>6x+3y=15</em>

<em>6x+3y=156(2y+10)+3y=15</em>

<em>15y</em><em>+</em><em>60</em><em>=</em><em>15</em><em> </em>(Simplify both sides of the equation)

<em>15y+60+−60=15+−60</em><em> </em>(Add -60 to both sides)

15y=−45

<em>15y</em><em>/</em><em>15=−45</em><em>/</em><em>15</em>(Divide both sides by 15)

y=−3

Step: Substitute −3 for y inx=2y+10:

x=2y+10

x=(2)(−3)+10

x=4(Simplify both sides of the equation)

Answer:

x=4 and y=−3

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Solve for x.<br> X + 142<br> 135°
Lyrx [107]

Answer:

X=-7

Step-by-step explanation:

X + 142=135°

X=135-142

X=-7

So the value of X is -7

4 0
2 years ago
calvin was earning $40 an hour giving basketball lessons, but decided to lower his prive to $34. What percent did he decrease hi
Julli [10]

Answer:

15%  

Step-by-step explanation:

$40 : 100 = 0,4

1% is $0,4

$6 : 0,4 = 15%

So the percentage is 15%.

7 0
2 years ago
A colony of 85 bacteria doubles in size every 126 minutes. What will the population be 378
SVETLANKA909090 [29]

Answer:

680 Bacteria

Step-by-step explanation:

378 is evenly divisible by 126, which is equal to 3.

The first 126 minutes, the 85 bacteria will double to 170 bacteria.

The second 126 minutes (252 minutes total), the 170 bacteria will double to 340 bacteria.

The final 126 minutes (378 minutes total), the 340 bacteria will double to 680 bacteria total.

If this helped, a brainliest would be greatly appreciated!

6 0
2 years ago
Read 2 more answers
Bring the fraction a/a−4 to a denominator of 16−a^2<br><br> really do appreciate this thx
RSB [31]

Answer:

-a(a+4)/(16 - a²)

Step-by-step explanation:

            a/(a - 4)                  Multiply by (a + 4)/(a + 4)

= a(a + 4)/[(a – 4)(a + 4)]     Multiply the denominatorator terms

= a(a + 4)/(a² - 16)               Multiply by -1/(-1)

= -a(a+4)/(-a² + 16)              Reorder terms in denominator

= -a(a+4)/(16 - a²)

5 0
3 years ago
Please help me with this
Alisiya [41]
Woahhhh lol one sec
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3 years ago
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