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harina [27]
3 years ago
10

Brenda thought of a number divided it by 5 and then added seven to her answer she got the final number 11 what was her starting

number​
Mathematics
1 answer:
irina1246 [14]3 years ago
6 0

Answer:

20

Step-by-step explanation:

lets assume the number she thought of was x

\frac{x}{5}

then she added 7 to it and got 11

\frac{x}{5}  + 7 = 11

l.c.m

\frac{x + 35}{5}  = 11

cross multiply

x + 35 = 11 \times 5

x  + 35 = 55

x = 55 - 35

x = 20

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2*a1 = (2, -4,0)
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sum = (2, -1, 6) = b

Hope this helps

3 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
A robotic machine fills containers with an acid solution at the rate of 50 + 5 t milliliters (mL) per second, where t is in seco
Alika [10]

Answer:

12,000

Step-by-step explanation:

The machine fills the containers at a rate of 50+5t milliliters (mL) per second.

Therefore, the rate of change of the number of containers, N is:

\dfrac{dN}{dt}=50+5t, 0\leq t\leq 60

dN=(50+5t)dt\\$Taking integrals of both sides\\\int dN=\int (50+5t)dt\\N(t)=50t+\frac{5t^2}{2}+C $(C a constant of integration)\\\\When t=0, , No containers are filled, therefore:$ N(t)=0\\0=50(0)+\frac{5(0)^2}{2}+C\\C=0\\$Therefore, N(t)=50t+2.5t^2

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