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AnnZ [28]
2 years ago
9

PLEASE HELP QUICKLY AS POSSIBLE THANK YOU :) ​

Mathematics
1 answer:
Hoochie [10]2 years ago
6 0

Answer:

$40.52

Step-by-step explanation:

You add the amount of all the t-shirts that Mike bought and subtract it from 100.

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HELP ASAP!!!!!!!!!!!!!
OLEGan [10]

Answer:

∠ABC=90°

Step-by-step explanation:

if ∠DAB =110 then ∠BAC =180-110 =70° because straighht lines make 180°∠s

use the fact that the sum of angles in a Δ is 180°

∠ABC= 180-20-70= 90

7 0
3 years ago
What is this answer? I have no idea. pls help :( will give brainliest
Artist 52 [7]
The answer is B.

Negative numbers are to the far left if you were using a number line, so -1 to the 3rd power is -1. Everything else is positive. 1/4 is the same as 0.25 which is less than positive 1, positive 8.8 is next and the last would be -5 to the 2nd power which is 25.
5 0
3 years ago
PLEASE HELP!! GRADE 7 MATHEMATICS!!!
Rzqust [24]
The area of 3x5 face is used 4 times rather then twice
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5 0
3 years ago
The percent of concentration of a certain drug in the bloodstream x hours after the drug is administered is given by K(x) 5x/x^2
Olegator [25]

Given :

The percent of concentration of a certain drug in the bloodstream x hours after the drug is administered is given by K(x) = \dfrac{5x}{x^2+9}.

To Find :

Find the time at which the concentration is a maximum. b. Find the maximum concentration.

Solution :

For maximum value of x, K'(x) = 0.

K'(x) = \dfrac{5(x^2+9)- 5x(2x)}{(x^2+9)^2}=0\\\\5x^2+45-10x^2=0\\\\5x^2 = 45\\\\x = \pm 3

Since, time cannot be negative, so ignoring x = -3 .

Putting value of x = 3, we get, K(3) = 15/( 9 + 9) = 5/6

Therefore, maximum value drug in bloodstream is 5/6 at time x = 3 units.

Hence, this is the required solution.

5 0
2 years ago
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Elena-2011 [213]
The exponents of expression one are the same as the exponents of expression two
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