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Tema [17]
3 years ago
7

Can someone help me with this please

Mathematics
1 answer:
svp [43]3 years ago
7 0

Answer:

8.94427191

Step-by-step explanation:

8^2 + y^2 = 12^2

64 + y^2 = 144

y^2 = 80

y = 8.94427191

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What is the answer of equation 9x(30+7)=(9x30)+(9x7)
RSB [31]

(9x30) =270 (9x7)  =63


Distributive Property

5 0
3 years ago
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Solve systems of equations by algebraically x-2y=7 <br> 2x+5y =5
Natali [406]

Answer:

(5,-1) or x=5 y=-1

Step-by-step explanation:

I used the substitution method to solve this!

<em>1. Pick one of your equations and solve for one of the variables. I chose the first equation and solved for x.</em>

x-2y=7

(Move the -2y to the other side of the equation in order to get the x by itself. You do the opposite, so it becomes +2y.)

x=2y+7

<em>2. Now take your second equation and plug in what you got for x into the x variable.</em>

2(2y+7)+5y=5

(Multiple 2 by everything inside of the parentheses.)

4y+14+5y=5

(We want to get the y by itself, so move the 14 to the other side.)

4y+5y=-14+5

(Combine all the like terms.)

9y=-9

(Divide the 9 from the y. What you do to one side you must do to the other.)

y=-1

<em>3. Since you have one variable solved for. Now take the first equation and plug in your y.</em>

x-2(-1)=7

(Multiple -2 by -1)

x+2=7

(Move the 2 to the other side in order to get the x by itself.)

x=5

<em>4. If needed, plug in your x and y values into the equations in order to check your answer.</em>

Hope this could help!

8 0
3 years ago
Read 2 more answers
If a $6.00 ball was bought for $5.25, what was the percentage of the discount?
andriy [413]

Answer:

B

Step-by-step explanation:

x% of 6 = 5.25

\frac{x}{100} x 6 = 5.25

\frac{(5.25)(100)}{6} = x

x = 87.5 %

discount = 100 - 87.5 %

= 12.5 %

6 0
3 years ago
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4(w + 5) =——w+——<br><br> PLEASE HELP I WILL MARK AS BRAINLIEST IF CORRECT
Rudiy27

Answer:

4(w+5) = 4w+20

Step-by-step explanation:

use distributive property and you get your answer :)

4*w = 4w

4*5=20

I hope this helps :))

8 0
3 years ago
Pls help I forgot how to solve this kind of problem
Maslowich

Answer:

72.1110255093 cm

Step-by-step explanation:

round it if you have to

8 0
3 years ago
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