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mel-nik [20]
3 years ago
11

Evaluate 5 - 4b if b = -3​

Mathematics
1 answer:
victus00 [196]3 years ago
4 0

Answer:

17

Step-by-step explanation:

5-4b ; b=-3

- substitute b= -3 into the expression

5-4×(-3)

- multiply the numbers

(-4×(-3)=+12) 5+12

- add the numbers

(5+12=17)

SOLUTION: 17

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Step-by-step explanation:

He starts off with $100 in his account. He then take so $45 to purchase a pair of jeans, so we have to subtract 45 from 100 and that gives us $55. He now has $55 in his account, he then adds another $25 to his account, so we have to add 25 to 55 and that will give us $80 in his account. Finally on Friday he takes out $98 of his checking account. He takes out more than he has in his checking account so we have to subtract $80 from $98 and we will get $18, but since he takes out more than what he has in his account the answer will be negative and we end up with -18 dollars in his checking account.

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20 pts and a mark!!! A store is having a sale on jelly beans and trail mix. For 6 pounds of jelly beans and 2 pounds of trail mi
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The cost of Trail Mix      = $ \frac{9}{4} $

Step-by-step explanation:

Given the cost of 6 pounds of Jelly Beans and 2 pounds of trail mix is $12.

Also, the cost of 3 pounds of Jelly Beans and 5 pounds of Trail mix is $15.

Call the cost of one pound of Jelly beans as J

And cost of one pound of Trail Mix as T.

Now, converting the given data to mathematical form, we would have:

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Dividing through out by 2 we have:

$ 3J + T = 6 \hspace{15mm}  .....(1) $

$ 3J + 5T = 15 \hspace{15mm} ....(2) $

To solve (1) and (2), subtract the two equations which will give us:

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Substituting the value of T in (1), we have:

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$ \implies 3J = \frac{24 - 9}{4} = \frac{(3)(8 - 3)}{4} = \frac{5}{4} $

∴                                               J  = 5/4

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