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nikdorinn [45]
3 years ago
6

If 4b-3=2b, then 12b=

Mathematics
1 answer:
Andru [333]3 years ago
6 0
Hi there! The answer is 18.

First we need to solve the first equation for b.
4b - 3 = 2b

Subtract 2b from both sides.
2b - 3 = 0

Add 3 to both sides.
2b = 3

Divide both sides by 2.
b = \frac{3}{2} = 1 \frac{1}{2}

Now we can plug our value of b into the second expression.
12b = 12 \times 1 \frac{1}{2} = 18
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kirill [66]

Answer: $20

Step-by-step explanation:

If she already has 9, and she needs 49, take that extra 9 off 49 and then she needs 40 more and she gets 2 for a dollar, she'll need to spend $20 to get 40 headbands. Can I please get Brainliest?

7 0
3 years ago
How many different ways are there to choose a subset of the set {1,2,3,4,5,6} so that the product of the members of the subset i
zvonat [6]

You have to pick at least one even factor from the set to make an even product.

There are 3 even numbers to choose from, and we can pick up to 3 additional odd numbers.

For example, if we pick out 1 even number and 2 odd numbers, this can be done in

\dbinom 31 \dbinom 32 = 3\cdot3 = 9

ways. If we pick out 3 even numbers and 0 odd numbers, this can be done in

\dbinom 33 \dbinom 30 = 1\cdot1 = 1

way.

The total count is then the sum of all possible selections with at least 1 even number and between 0 and 3 odd numbers.

\displaystyle \sum_{e=1}^3 \binom 3e \sum_{o=0}^3 \binom 3o = 2^3 \sum_{e=1}^3 \binom3e = 8 \left(\sum_{e=0}^3 \binom3e - \binom30\right) = 8(2^3 - 1) = \boxed{56}

where we use the binomial identity

\displaystyle \sum_{k=0}^n \binom nk = \sum_{k=0}^n \binom nk 1^{n-k} 1^k = (1+1)^n = 2^n

3 0
1 year ago
At jim's juice factory, his machine can fill 300 juice boxes an hour. Each box holds 0.8 cups How many gallons of juice does jim
anygoal [31]
300 boxes
0.8 cup per box

300 * 0.8 cups = 240 cups

There are 16 cups in a gallon.

240/16 gal = 15 gal

Answer: 15

5 0
3 years ago
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algol13
You would add 3/4 to that
5 0
3 years ago
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Use the Quadratic Formula to solve the equation. (Enter your answers as a comma-separated list.) 13x^2 +1 = -10
12345 [234]

Step-by-step explanation:

The given quadratic equation is :

13x^2 +1 = -10x\\\\or\\\\13x^2+10x+1=0

The formula to solve a quadratic equation is :

x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}

Put a = 13, b = 10 and c = 1

So,

x=\dfrac{-10\pm \sqrt{10^2-4(13)(1)} }{2(13)}\\\\x=-0.118, -0.651

Hence, this is the required solution.

3 0
3 years ago
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