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3 years ago

Use the expression 5a – 2b – 3 + 2b – 6a.

Mathematics

1 answer:

ella [17]3 years ago

4 0

Answer:

5a + (-6a) + (-2b) + 2b + (-3) = -a -3 or -(a + 3) so first answer is correct because -(a + 3) is the same as -(3 + a)

Step-by-step explanation:

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What is the least comun denomanater of 9/10 and 7/8??

GenaCL600 [577]

Answer:

The least common denomator of 10 and 8 is 40

Step-by-step explanation:

8 10

16 20

24 30

32 40

8 0

3 years ago

Read 2 more answers

10) Find the distance between (2, 3) and (-3, -2) A) 2 B) 5 C) 50 = 5 2 D) 25

PSYCHO15rus [73]

Answer:

The answer is

<h2> $5 \sqrt{2} \: \: \: \: units$ </h2>

Step-by-step explanation:

The distance between two points can be found by using the formula

$d = \sqrt{ ({x1 - x2})^{2} + ({y1 - y2})^{2} } \\$

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

(2, 3) and (-3, -2)

The distance between them is

$d = \sqrt{( {2 + 3})^{2} + ({3 + 2})^{2} } \\ = \sqrt{ {5}^{2} + {5}^{2} } \\ = \sqrt{25 + 25} \\ = \sqrt{50} \\ = 5 \sqrt{2}$

We have the final answer as

$5 \sqrt{2} \: \: \: \: units$

Hope this helps you

6 0

4 years ago

1 over 3b = 4 over 5. which of the following equals b in this equation?

Yuri [45]

Answer:

$b=2\frac{2}{5}$

Step-by-step explanation:

we have

$\frac{1}{3}b=\frac{4}{5}$

solve for b

That means ---> isolate the variable b

Multiply by 3 both sides

$\frac{1}{3}b(3)=\frac{4}{5}(3)$

simplify

$b=\frac{12}{5}$

Convert to mixed number

$\frac{12}{5}=\frac{10}{5}+\frac{2}{5}=2\frac{2}{5}$

5 0

3 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

3 years ago

PLZ HURRY ITS FOR A TEST

S_A_V [24]

96=4P+2(8)
96=4P+16
80=4P
P=20

8 0

3 years ago

Read 2 more answers