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vazorg [7]
3 years ago
11

HURRRYYYY Evaluate the following expression: 7 + 3b + 4b use a=3 and b=5

Mathematics
2 answers:
marin [14]3 years ago
7 0

Answer:

222222222222224.705876

Elza [17]3 years ago
4 0

Answer:

42

Step-by-step explanation:

You would substitute B where is needs to go, 7 + 3(5) + 4(5). First multiply 3 x 5 to get 15, and then multiply 4 x 5 to get 20, 7 + 15 + 20. 7 + 15 = 22 + 20 = 42. I hope this helps.

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A theater group made appearances in two cities. The hotel charge before tax in the second city was $1500 higher than in the firs
expeople1 [14]

Sorry for the delay!

Let x = charge before tax in 1st city, and y = charge before tax in 2nd city

y = $1500 + x

4/100x => tax in first city

3.5/100y => tax in second city

0.04x + 0.035y = $408.75

We have the following system of equations to solve:

\begin{bmatrix}y=1500+x\\ 0.04x+0.035y=408.75\end{bmatrix}\\\\\mathrm{Substitute\:}y=1500+x\\\\begin{bmatrix}0.04x+0.035\left(1500+x\right)=408.75\end{bmatrix}\\\begin{bmatrix}0.075x+52.5=408.75\end{bmatrix}\\\\\ x = 4750\\\mathrm{For\:}y=1500+x\\\mathrm{Substitute\:}x=4750:\\\\y=1500+4750 = 6250

So the hotel charge before tax in city 1 = $4750, and the hotel charge before tax in city 2 = $6250

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3 years ago
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What number does x stand for in this equation?<br><br> -7x + 6=27
AURORKA [14]
⓵ You need to solve the left side first in order to isolate the × and find it’s value :

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↓

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If you find it too difficult to divide a number by a negative, just divide 21 by 7 and always remember that when dividing, when the signs are different the answer is negative. So knowing that you could just divide 21 by 7, which is 3, and add a negative sign in front!


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3 0
4 years ago
How do you solve 9÷m-1=-2
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Hi!

You need to multiply to remove the variable from the denominator.

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