Answer:
w=14
Step-by-step explanation:
Let's solve your equation step-by-step.
710−35w=570−25w
Step 1: Simplify both sides of the equation.
710−35w=570−25w
710+−35w=570+−25w
−35w+710=−25w+570
Step 2: Add 25w to both sides.
−35w+710+25w=−25w+570+25w
−10w+710=570
Step 3: Subtract 710 from both sides.
−10w+710−710=570−710
−10w=−140
Step 4: Divide both sides by -10.
−10w
−10
=
−140
−10
w=14
K² + 13k + 30 = 0
This is a quadratic equation. Let's attempt solving it by factorization.
Coefficient of k² = 1, last term = 30
Multiply these two together 1*30 = 30
We think of two numbers that multiply to give 30 and add to give the middle term 13.
The two numbers are 3 and 10.
3*10 = 30, 3 + 10 = 13.
we replace the 13k with 3k + 10k
k² + 13k + 30 = 0
k² + 3k + 10k + 30 = 0
k(k + 3) + 10(k + 3) = 0
(k + 3)(k + 10) = 0
(k + 3) = 0 or (k + 10) = 0
k = 0 - 3 or k = 0 - 10
k = -3, or -10
I hope this helps.
<span>boys = 14x
</span><span>girls = 17x
14x + 17x = 186
31x = 186
x = 186/31
x = 6
</span>boys = 14x = 14 * 6 = 84
Answer:
Tree c
Step-by-step explanation: