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goldfiish [28.3K]
3 years ago
5

What's 7/9 times something equals 640

Mathematics
1 answer:
aksik [14]3 years ago
4 0
We'll use 'x' to represent that 'something.
7/9x=640.
Divide each side by 7/9 to isolate 'x'.
x = 822 6/7.
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four times daphne's age plus five times isaac's age adds up to 57. also, isaac's age is 11 less than twice daphne's age. how old
Talja [164]
4d + 5i = 57
i = 2d - 11

4d + 5(2d - 11) = 57
4d + 10d - 55 = 57
14d = 57 + 55
14d = 112
d = 112/14
d = 8 <== Daphne's age

i = 2d - 11
i = 2(8) - 11
i = 16 - 11
i = 5 <==Isaac's age
5 0
3 years ago
What is equalvient to 3x+3(5x-18)=108
Scorpion4ik [409]

Hey there!!

The given equation :

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This is equivalent to the above question.

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Hope my answer helps!!

6 0
3 years ago
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Darcy gave her hairstylist a $ 4.90 The tip was 14​% of the cost of the haircut . Write an equation to find​ b, the cost of the
melamori03 [73]

Answer:

Equation: 4.90/b = 14/100

Solution: b = $35

Step-by-step explanation:

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Solve for b:

4.90/b = 14/100

490 = 14b

35 = b

Check your work:

35 × 0.14 = 4.90

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8 0
3 years ago
I need to know this asap!
Vinvika [58]

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4 0
3 years ago
Help me with this please
svp [43]
3/2
I picked a point and counted up 3 and over 2 to the next point
8 0
3 years ago
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