teresajohnson1523
25.09.2020 •
Mathematics
PLEASE ill mark brainlist i need help on these
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Ответ:
Step-by-step explanation:
1. 9 - 3(2x - 4)
= 9 - 6x + 12 = 9 + 12 - 6x = 21 - 6x
2. -8(5b + 2) - 7(b - 5)
= -40b - 16 - 7b + 35
= -40b - 7b - 16 + 35
= -47b + 19
3. x - 6(3 - 2x)
= x - 18 + 12x
= x + 12x - 18
= 13x - 18
4. -7x + 5(1 - 8x)
= -7x + 5 - 40x
= -7x - 40x + 5
= -47x + 5
= 5 - 47x
5. x + 4 - 7(x - 5)
= x + 4 - 7x + 35
= x - 7x + 4 + 35
= -6x + 39
Ответ:
75 pounds
Step-by-step explanation:
(x) + (x) + (x+20) = 185
3x + 20 = 185
3x = 165
x = 55
Large dog = 55 + 20 = 75