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Svetach [21]
3 years ago
11

2n +9+5n=30 need help on this

Mathematics
2 answers:
Rus_ich [418]3 years ago
8 0
2n+9+5n=30  combine like terms on left side

7n+9=30  subtract 9 from both sides

7n=21  divide both sides by 7

n=3
sveticcg [70]3 years ago
8 0
N = 3

add like terms: 7n + 9 = 30
subtract 9 from both sides: 7n = 21
divide 7 from both sides
n = 3
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Anvisha [2.4K]
Start by taking the information we know, and write equations to represent the realationships:

1) "1/8 lbs less flour to make bread than to make cookies"         
     b=c-\frac{1}{8}

2) "1/4 lb more flour to make cookies than to make brownies:
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3) "she used 1/2 lb of flour ro make bread"
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From here you can solve for w using back substitution. 
7 0
3 years ago
Francis went to the sporting goods store and spent $75.15 on 6 items.
MArishka [77]

Answer:

$6.03

Step-by-step explanation:

The question is asking us how much each pair of socks cost. With the information we are given, we know that there are 5 pairs and that they all cost the same amount. If the total were just the 5 socks, we could easily divide the total by 5 to get the price of each pair but that's not the case. The soccer ball is included in the final cost. To overcome this, we just have to subtract the soccer ball's cost ($45) from the total.

So we subtract $45 from $75.15, giving us $30.15, the total amount of all the socks. However we need to find out how much each pair costs and there are 5 of them, so we divide 30.15 by 5. This gives us the answer, $6.03.

Each pair of socks cost $6.03.

Simpler Explanation:

  • $75.15 - $45 = $30.15
  • $30.15 / 5 = $6.03

The answer is $6.03

5 0
3 years ago
Please help !!!? Me
maw [93]

Answer:11

Step-by-step explanation:

First multiply 4 and 2.

Which makes the equation 3+8

Which makes your answer 11

5 0
3 years ago
Read 2 more answers
Use the quadratic formula to solve the equation if necessary round to the nearest hundredth
densk [106]
-5y^2 + 2y + 2 = 0

y = -2 ± ✓4 - 4*-5*2. /. -10

y = -2 ± ✓44. / -10

y = -1 ± ✓11. / -5

(-1+✓11)/-5. and (-1-✓11)/-5

5 0
3 years ago
Select the factored form of this expression if it cannot be factored select already factored 2x-4
Dima020 [189]

Answer:

c

Step-by-step explanation:

4 0
2 years ago
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