The answer is A. Two times two is four, and four plus seven (3.5 times 2) is eleven.
X= -213/10 , look at the steps in the picture
Answer:
Step-by-step explanation:
7.50a + 2.50c = 1945
a + c = 364
Use -2.50 for 2nd equation
7.50a + 2.50c = 1945
-2.50a - 2.5oc = -910
5a = 1035
a = 207 adult tickets were sold
207 + c = 1945
c = 1738 child's tickets were sold
Answer:
30a + 18b
Step-by-step explanation:
6(5a+3b)
Just multiply the six in both numbers
( 6x5a) + (6x3b)
= 30a +18b
Hope this helps =)
Answer:
u = x²
Step-by-step explanation:
4x⁴ − 21x² + 20 = 0
4(x²)² − 21x² + 20 = 0
If we substitute u = x²:
4u² − 21u + 20 = 0