Answer:
a=20
Step-by-step explanation:
7+13=20
20-7=13
(3+5.50)5
8.50*5=42.5
Derek spends $42.50 each school week.
Answer:
A
Step-by-step explanation:
the standard form of a quadratic equation is
ax² + bx + c = 0 : a ≠ 0
obtain (5 + x)(5 - x) = 7 in this form by expanding the factors
25 - x ² = 7 ( subtract 7 from both sides )
18 - x² = 0 ( multiply through by - 1 )
x² - 18 = 0 ← in standard form
with a = 1, b= 0 and c = - 18 → A
Answer:
Big square - unshaded = shaded
((8+4)X(10+5))-(10X8)=100
Answer: 100
Step-by-step explanation:
