Remember, you can do anything to an equation as long as you do it to both sides
minus 1 both sides
7x=35
divide both sides by 7
x=5
Find A ∩ B if A = {2, 5, 8, 11, 14} and B = {1, 3, 5, 7}. {5} {1, 2, 3, 5, 7, 8, 11, 14}
Lana71 [14]
Answer:
A ∩ B = {5}
Step-by-step explanation:
We are trying to find the intersection (what they both have in common)
A = {2, 5, 8, 11, 14}
B = {1, 3, 5, 7}
The only thing they both have in common is 5
A ∩ B = {5}
Answer: 10 pans
Step-by-step explanation:
<u>Step 1:</u>
If the number of biscuits needed= 80
<u>Step 2:</u>
And the number of biscuits on each pan= 8
<u>Step 3:</u>
Then the number of pans needed= 80 ÷ 8
Answer: 80 ÷ 8 = 10pans
Because the 2 lines are parallel, (5x+5) + 115 need to equal 180.
Solving for X:
5x+5 +115 = 180
5x + 120 = 180
Subtract 120 from each side:
5x = 60
Divide both sides by 5
x= 60/5
X = 12
W can equal any number that is smaller then -9 because if w was -9 then they would be equal