<span><span>L
* W = 300 sq ft
</span><span>
Length is 10 ft greater than twice the width.
L = 2W + 10
Substituting
(2W+10)*W = 300
2W^2 + 10W = 300
Divide both sides by 2
W^2 + 5W = 150
W^2 + 5W - 150 = 0
Factor
(W +15)(W -10) = 0</span></span>
<span>
<span>
Roots are W=-15 and W=10.
A negative width is impossible, so W=10
L = 2W + 10
L = 2(10) + 10
L = 30</span></span>
length = 30 feet, width = 10 feet
<span> Check:
30*10 = 300</span>
Answer:
This system has infinite solutions and it would be much easier to solve it by elimination but substitution it is.
Step-by-step explanation:
-3x+3y=9
-x+y=3
Isolate either x or y in any of the equations. I'll go with the second.
y = 3+x
Now substitute this for y in the first equation.
-3x+3(3+x)=9
Distribute the 3
-3x+9+3x=9
Combine like terms:
9=9
0=0
It's infinite
Answer:
click the the photo to see better
Step-by-step explanation:
<h2>Answer: </h2><h2>D. 2/3 or
</h2><h2>~</h2><h3>To solve for 'X', isolate the variable 'x' by dividing each side by factors that don't contain the variable 'x'.</h3><h3>Exact Form:</h3><h3>x = 2/3</h3><h2>~</h2>
Hope you have a good day, Loves!
Also if I'm right can you let me know, please?
<em>Also Also if I am right can I please have Brainliest??</em>
<u><em>You don't need to, I'm just glad I could help. ^^</em></u>
Answer:
40 cents.
Step-by-step explanation:
If he has enough money to buy 6 markers ate $3 for 6 then he must have 30/6 * 3
= $15.
So 30 pencils cost 15 - 3 = $12.
Each pencil costs 12/30
= $0.4
= 40 cents.
