You would use PEMDAS so that means you would start by multiplying 3 with the parentheses 3(2+6d) on both sides then you would combine like terms so you would add 18d+18d. Then you would subtract 6- -5 on both sides then solve for a one-step equation
3(2+6d)-5=3(2+6d)-5
6+18d-5=6+18d-5
6+36d-5=6-5
1+36d=1
-1. -1
36d/36. 0/30
D=0
Answer:
1) area = (x + 3)(2x + 3) ft²
2) 299 ft²
Step-by-step explanation:
<u>Question 1</u>
Area of a rectangle = width x length
Given:
- width = x + 3
- length = 2x + 3
⇒ area = (x + 3)(2x + 3) ft²
<u>Question 2</u>
If x = 10:
⇒ area = (10 + 3)(2(10) + 3)
= 13 · 23
= 299 ft²
Answer:
C.
Step-by-step explanation:
first three digits are the same but for the 4th digit c has the highest value
Answer:
7.2
Step-by-step explanation:
When rounding, you check the number to its right. If it's 4 or lower, it will stay the same. If it's 5 or higher, you add one to it.
Hope this helps!
Answer:4x^2 +28x +49=(2x +7)^2
Step-by-step explanation:
a2±2ab+b2=(a±b)2
In this case
a=2x and b=7 ...
4x2+28x+49=(2x)2+(2⋅
(2x)⋅
7)+72=(2x+7)2