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3 years ago

Help me please i really need it!

Mathematics

1 answer:

Mademuasel [1]3 years ago

6 0

Buddy what is the problem lol

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10) Solve the equation for the variable "a": 2(x + a) = 4b

Aliun [14]

Answer:

let me seee what i n do brother

Step-by-step explanation:

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3 years ago

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Multiply (2m+3)(m^2-2m+2)

Dahasolnce [82]

Answer:

Step-by-step explanation:

The first step is to distribute the 2m and 3 to ( $m^2-2m+2$ ), like so:

$(2m+3)(m^2-2m+2)$

$2m^3-4m^2+4m+3m^2-6m+6$

Then, add like terms:

$2m^3 -m^2 -2m + 6$

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3 years ago

1. What is the y-intercept? 4x+5y = -15 a. (3, 0) b. (0,-3) c. (x, 0) d. (y, 0)

kipiarov [429]

Answer:

The y-intercept is answer b. (0, -3)

Step-by-step explanation:

To find the y-intercept, fill in x with 0.

4x + 5y = -15

4(0) + 5y = -15

0 + 5y = -15

5y = -15

y = -3

So, the y-intercept would be (0, -3).

6 0

3 years ago

A contaminant is leaking into a lake at a rate of R(t) = 1700e^0.06t gal/h. Enzymes that neutralize the contaminant have been ad

olasank [31]

Answer:

16,460 gallons

Step-by-step explanation:

This is a differential equation problem, we have a constant flow of contaminant into the lake, but also we know that only a fraction of that quantity of contaminant remains because of the enzymes. For that reason, the differential equation of contaminant's flow into the lake would be:

$\frac{dQ}{dt} =1700exp(0.06t)*exp(-0.32t)\\\frac{dQ}{dt} =1700exp(-0.26t)\\$

Then, we have to integrate in order to find the equation for Q(t), as the quantity of contaminant in the lake, in function of time.

$\int\limits^0_t {dQ}=\int\limits^0_t {1700exp(-0.26t)dt}\\Q(t)=\frac{1700}{-0.26} exp(-0.26t)+C \\$

Now, we use the given conditions to replace them in the equation, in order to solve for $C$

$t_{0} =0\\Q_{0}=10,000\\Q_{0}=-6538exp(-0.26*0)+C\\C=10,000+6538=16538$

Then, we reorganize the equation and we replace t for 17 hours, in order to determine the quantity of contaminant at that time:

$Q_{t} =-6538exp(-0.26t)+16538\\Q_{17} =-6538exp(-0.26*17)+16538\\Q_{17} =16460 gallons$

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3 years ago

Using distributive property 7(5x+12)

Anuta_ua [19.1K]

35x+84 is the answer :)

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3 years ago

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