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2 years ago

What must be added to a^2+3/5a

1 answer:

3 0

This question doesn’t really make sense- is it multiple choice, if so what are the options? A can be anything as long as it’s the same?

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What is 3 plus 4 and 4 times 55

Sergio [31]

7 and 220 is the answer.

5 0

2 years ago

Read 2 more answers

What is mZDAR in circle A?

Andreas93 [3]

Answer:

68°

Step-by-step explanation:

Since, angle subtended on the circumference of the circle is half angle subtended on the center of the circle.

$\therefore m\angle DBR = \frac{1}{2} \times m\angle DAR\\\\\therefore 34\degree = \frac{1}{2} \times m\angle DAR\\\\\therefore 34\degree \times 2= m\angle DAR\\\\\therefore 68\degree = m\angle DAR\\\\\therefore m\angle DAR=68\degree$

5 0

2 years ago

Find the surface area of the rectangular prisms given the dimensions 4x3x2

earnstyle [38]

Answer:

so your answer is 52!!!

Step-by-step explanation:

Surface area is 2*l*h+2*l*w+2*w*h

Hope this helps

Pls mark brainleist

Thanks!!

3 0

2 years ago

The concentration of a drug in the bloodstream C(t) at any time t, in hours, is described by the equationC(t)=100t/t^2+25where t

alisha [4.7K]

Answer:

It will take 5 hours until it reaches its maximum concentration.

Step-by-step explanation:

The maximum concentration will happen in t hours. t is found when

$C'(t) = 0$

In this problem

$C(t) = \frac{100t}{t^{2} + 25}$

Applying the quotient derivative formula

$C'(t) = \frac{(100t)'(t^{2} + 25) - (t^{2} + 25)'(100t)}{(t^{2} + 25)^{2}}$

$C'(t) = \frac{100t^{2} + 2500 - 200t^{2}}{(t^{2} + 25)^{2}}$

$C'(t) = \frac{-100t^{2} + 2500}{(t^{2} + 25)^{2}}$

A fraction is equal to zero when the numerator is 0. So

$-100t^{2} + 2500 = 0$

$100t^{2} = 2500$

$t^{2} = 25$

$t = \pm \sqrt{25}$

$t = \pm 5$

We use only positive value.

It will take 5 hours until it reaches its maximum concentration.

4 0

2 years ago

Reginald answered at 78% of the questions on his social studies quiz correctly what fractional part of the question did he not a

Otrada [13]

If Reginald answered 78% correctly out of a total 100%, we can subtract 78 from 100:

100 - 78 = 22

He answered 22% of the question incorrectly. But how do we find the bottom number? Remember what we said earlier. The <u>total</u> is 100%. He got 22% out of 100% wrong. Wouldn't that be $\frac{22}{100}$ ?

Now that we know our fraction, we can reduce it. Let's start by dividing our fraction in half:

$\frac{22}{100}$ = $\frac{11}{50}$

Can we reduce that any more? No, because 11 can not be divided by anything else.

If you want the first fraction, go with $\frac{22}{100}$ , but if they want a reduced fraction, then $\frac{11}{50}$ would be best.

8 0

3 years ago

What must be added to a^2+3/5a​

What must be added to a^2+3/5a