更新1:
sorry i meant show not she
3/8=b/40 She me steps plz I have a test coming up?
回答 (5)
2015-09-04 5:39 am
✔ 最佳答案
Method 1 :3/8=b/40
b/40 = 3/8
Multiplied by the LCD of the denominators (i.e. 40):
(b/40) × 40 = (3/8) × 40
b = 15
Method 2 :
3/8=b/40
Applied cross-multiplication :
8 × b = 3 × 40
8b = 120
Divide by 8 :
8b/8 = 120/8
b = 15
2015-09-04 5:39 am
when you have a proportion you cross multiply. numerator on the left of the equal times the denominator on the right of the equals ....equals the the denominator on the left times the numerator on the right.
8b = 120
b = 15
beat me by 22 seconds
8b = 120
b = 15
beat me by 22 seconds
2015-09-04 6:17 am
try this one
the first denominator is 8, look it becomes 40 in the 2nd denominator, why? just multiply 5 to 8 you get 40
the first numerator is 3, multiply 5, you get 15 which is the answer,
solved in just a second.
the first denominator is 8, look it becomes 40 in the 2nd denominator, why? just multiply 5 to 8 you get 40
the first numerator is 3, multiply 5, you get 15 which is the answer,
solved in just a second.
2015-09-04 6:01 am
VERY EASY! 40 x 3 = 120 / 8 = 15
2015-09-04 5:39 am
Multiply both sides of the equation by 40:
(3/8)*40 = (b/40)*40
120/8 = b
Simplify:
b = 15
(3/8)*40 = (b/40)*40
120/8 = b
Simplify:
b = 15
收錄日期: 2021-04-18 00:12:37
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