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Alex787 [66]
3 years ago
10

If 7y + 4 = -3 then what does y stand for

Mathematics
2 answers:
VARVARA [1.3K]3 years ago
5 0

7y+4 = -3

7y = -7

y = -7/7

y = -1

nikitadnepr [17]3 years ago
4 0
<span>Given the expression 7y + 4 = -3, y is equal to -1.</span>
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1 + 2k = 5k + 7 I got k=2 don't know if it's the right answer ?
DochEvi [55]
You are close, but it is not the correct answer.

1 + 2k = 5k + 7

First, since we are trying to get the variable by itself, we need to move all things to one side. Let's subtract 1 from each side. 
2k = 5k + 7 - 1

Second, we can now subtract (7 - 1) to get 6. Let's add that into our problem and then subtract 5 from each side, still trying to get the variable by itself.
2k - 5k = 6

Third, subtract (2k - 5k) to get -3k. Hint the negative symbol now. If the problem were switched the other way, it would still be a positive. 
-3k = 6

Fourth, we can now divide each side by -3. This results in a fraction and also getting the variable by itself on one side of the problem. Remember the negative sign in front of the fraction since (-3) carried it.
k = - \frac{6}{3}

Fifth, this is our last step. We need to simplify the fraction. Since out fraction is 6/3, which number multiples by 3 to get the answer of 6? The answer is 2, since (3 × 2 = 6). Don't forget the negative!
k = -2

Answer: \fbox {k = -2}
4 0
4 years ago
Blank divided by 7&gt;800
djverab [1.8K]
Hi there

Replace the blank space by x

so x/7 > 800
All you have to do is cross-multiply

x > 7*800
x> 5600


I hope that's help ! 

8 0
3 years ago
Read 2 more answers
If you were to add 5 to my number and then divide by 4, you would get 7
Norma-Jean [14]
Let's make an equation. T will be the number.
(T+5)/4=7
Let's multiply both sides by 4 to get T by itself.
T+5=28
Subtract 5 from both sides.
T=23
Your number is 23.
3 0
3 years ago
Read 2 more answers
Average Inventory The DeMarco Pasta Company receives 600 cases of imported San Marzano tomato sauce every 30 days. The number of
lesya692 [45]

Answer: The average daily inventory is 200 cases.

Step-by-step explanation:

Since we have given that

N(t)=600-20√30t

We need to find the average daily inventory.

\dfrac{1}{b-a}\int\limits^a_b {600-20\sqrt{30t}} \, dt\\\\=\dfrac{1}{30}\int\limits^{30}_0 {600-20\sqrt{30t}} \, dt \\\\=\dfrac{1}{30}[600t-\dfrac{20(30t)^\frac{3}{2}}{45}|_0^{30}\\\\=\dfrac{1}{30}[18000-\dfrac{20\times 30^3}{45}]\\\\=\dfrac{1}{30}[18000-12000]\\\\=200

Hence, the average daily inventory is 200 cases.

7 0
3 years ago
80 marked up by 37.5 percent
Mariana [72]
Make 37.5% into decimal form : Since it is being marked up, add 100% = 1.375
1.375 x 80
     1.375
     x  80
_________
    0000
+11000
_________
  110.000

80 marked up by 37.5% is 110.
7 0
3 years ago
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