All categories

3 years ago

BRAINLIEST HELP ME PLEASEEEEEE IM IN DANGER OF STAYING BACK:(((

Mathematics

1 answer:

Andrew [12]3 years ago

5 0

Answer:

24 ounces of solution B
16 ounces of solution A

Step-by-step explanation:

The largest contributor of salt to the mix is the 45% solution (B), so we'll let our variable (b) represent the quantity of that. The total amount desired is 40 ounces, so the quantity of solution A is (40-b) ounces. Then the amount of salt in the mix is ...

0.45b +0.20(40-b) = 0.35(40)

Simplifying and subtracting 0.20(40), we get ...

0.25b = 0.15(40)

b = 40(.15/.25) = 24

(40-b) = 16

The scientist should use 24 ounces of Solution B and 16 ounces of Solution A.

You might be interested in

Parallel lines in real world, help please

e-lub [12.9K]

Answer:

The answer is B(65)

Step-by-step explanation:

you just do 180 - JCB = 65

so you do 180-65=115

hope this helps

6 0

3 years ago

Which points are on the line that connects points (0, 4) and (1, 2)? Select all that apply.

AVprozaik [17]

The points that connect (0,4) and (1,2) are B, E and F. Please mark Brainliest and Hope this Helps

7 0

3 years ago

On average, Tanner has noticed that 22 trains pass by his house daily (24 hours) on the nearby train tracks. What is the probabi

blondinia [14]

Answer:

0.11069

Step-by-step explanation:

We will assume that the trains pass by his house following a uniform distribution with values between 0 and 24. The probability of a train passing on a 9-hour time period is 9/24 = 3/8 = 0.375. Lets call Y the amount of trains passing by his house during that 9-hour period. Y follows a Binomail distribution with parameters 22 and 0.375.

P(Y ≤ 5) = P(Y = 0) + P(Y=1) + P(Y=2) + P(Y=3) + P(Y=4) + P(Y=5) =

${22 \choose 0} * 0.375^0*(1-0.375)^{22} + {22 \choose 1}*0.375^1*(1-0.375)^{21} +\\\\{22 \choose 2} * 0.375^2*(1-0.375)^{20} + {22 \choose 3}*0.375^3*(1-0.375)^{19} + \\{22 \choose 4} * 0.375^4*(1-0.375)^{18} + {22 \choose 5}*0.375^5*(1-0.375)^{17} = 0.11069$

I hope that works for you!

4 0

3 years ago

I had 10 cookies. i gave 1/4 of cookies to the girl how many or lift

morpeh [17]

Answer:
1/4 of 10 is 2 1/2
then 7 1/2 is left

7 0

3 years ago

What is the quadratic regression equation that fits these data?

adelina 88 [10]

Answer: y= 2.38x^2 + 0.90x + 9.90

Step-by-step explanation:

A p e x

5 0

3 years ago