Answer: Letter Choice ( B): -x^2 - 4x + 7
Step-by-step explanation:
( 4x^2 - 7x + 9 ) - ( 5x^2 - 3x + 2 )
Remove Parentheses: (a) = a
4x^2 - 7x + 9 - ( 5x^2 - 3x + 2 )
- ( 5x^2 - 3x + 2 ): - 5x^2 + 3x - 2
Simplify:
4x^2 - 7x + 9 - 5x^2 + 3x - 2
Answer:
Letter Choice ( B ):
-X^2 - 4x + 7
Hope That Helps!
Answer: 2l+2w=48
Subtract 2w from both sides.
2l=48−2w
Divide both sides by 2.
2
2l
=
2
48−2w
Dividing by 2 undoes the multiplication by 2.
l=
2
48−2w
Divide 48−2w by 2.
l=24−w
Tina takes Karate classes every Tuesday and Thursday. The classes are 55 minutes long.
Take the 55 minutes and multiply that by 2 {2 represent Tuesday and Thurdsday} 55 x 2 = 110. Tina takes Karate classes for 110 minutes each week. Take the 110 and multiply that by 3 {3 represent the 3 weeks}. 110 x 3 = 330. 330 minutes is 5 hours and 30 minutes.
Tina's total hours of Karate in 3 weeks is 5 hours and 30 minutes.
We have,
and
Substituting the values of and in ,
➺
➺
Therefore, the value of F is .
<h3><u>Note</u>:</h3>
F = force
m = mass
a = acceleration.