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hammer [34]
2 years ago
10

Evaluate the following algebraic expression if a equals 3 and b equals 4 2a^+5b

Mathematics
1 answer:
Korolek [52]2 years ago
6 0
Replace a and b with their number value:

2a^2 + 5b = 2(3)^2 +5(4)
 do the 3^2 first: 3^2 = 9
 so now you have 2(9) +5(4)
 now multiply both sets of numbers: 2 x 9 = 18 and 5 x 4 = 20
 now add them:

18 +20 = 38




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Negative exponent in a scientific notation means your answer will be negative. <br> True or False
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Answer:

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3 years ago
5. y = 2x + 6<br> 2x - y=2
Crank

Step-by-step explanation:

y = 2x + 6

2x - y = 2

To solve this system of equations, let's first add the equations together:

(y) + (2x - y) = (2x + 6) + (2)

2x = 2x + 8

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0 = 8

There are no values of x that will make this equation true, so the lines never intersect, and therefore there are no solutions to this system of equations.

5 0
3 years ago
0 = −5n − 2n How do I solve this
masha68 [24]
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8 0
2 years ago
What number divided by 5 equals 6
djyliett [7]
The answer your looking for is 30
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6 0
3 years ago
Read 2 more answers
Jimmy's school is selling tickets to the
natka813 [3]
Children’s tickets are $4, adult tickets are $14




Explanation:

4a+6c=80

If they made $4 more dollars on the second day than the first by selling one extra child ticket then we know a child’s ticket is $4 per ticket.


4a+6*4=80
4a+24=80
4a=56
14=a

So each adult ticket costs $14.


You can check by filling in $14 and $4 for each equation.


4*14+6*4=80

4*14+7*4=84
3 0
2 years ago
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