Answer:
3. 4a(a + 1) - 15
step-by-step explanation:
1. (x +y)² + 11 (x + y) + 30
= x + y {(x +y) + 11} + 30
2. (a - b)² - 16(a - b) + 60
= (a - b){(a - b) - 16} + 60
3. 4a² + 4a - 15) - 15
4. 2x² + 5x + 2
= x(2x + 5) + 2
Answer:
1 times 42 and 6 times 7 for 42
1 times 0 and 5 times 6
(I did this question in school once)
Answer:
325 adults
Step-by-step explanation:
x=#adults
y=#children
x+y=937
2x+0.75y=1109
2x+2y=1874
<u>-2x-0.75y=1109</u>
1.25y=765
y=612
x=937-612
x=325
Answer:
227
Step-by-step explanation: