2 years ago

A 20% acid solution is mixed with a 70% acid solution to get 50 liters of a 40% solution.

Mathematics

1 answer:

lilavasa [31]2 years ago

4 0

Answer:

B. 2x + 7y 100% sure just got it right

Step-by-step explanation:

B. 2x + 7y

You might be interested in

What is another way to show that 4/6 = 8/12?

Varvara68 [4.7K]

what I think is the answer is 2/3

6 0

3 years ago

What equation is parallel to the line 3x+y=5

Alex_Xolod [135]

Answer:

Any equation with the slope -3 and a y intercept that does not equal 5

Step-by-step explanation:

a line is parallel if the line have the same slope, and different y intercepts

3x+y=5

in slope intercept form is

y=-3x+5

slope : -3

y intercept 5

3 0

3 years ago

Let A=(1,2,3,4,5)which of the following sets are equal to A?

Rom4ik [11]

Answer:

1. (4,1,2,3,5)

Step-by-step explanation:

Since all the members of set A are present in "1"

5 0

2 years ago

Maddie's monthly take home pay is $3,500. She is making monthly payments of $250 for a student loan and $218 for a credit card.

iren2701 [21]

Answer:

C. $482

Step-by-step explanation:

4 0

3 years ago

4. A statistician working for the National Basketball Association supplies the television announcers with interesting statistics

Sonbull [250]

Answer: 0.038

Step-by-step explanation:

Given: Total games : n= 375

Number of games won by the team that was winning the game at the end of the third quarter. = 300

The proportion (p) of the team that was winning the game at the end of the third quarter: $p=\dfrac{300}{375}=0.8$

Critical z-value for 90% confidence: z* = 1.645

Margin of error = $z^*\sqrt{\dfrac{(1-p)p}{n}}$

The margin of error in a 90% confidence interval estimate of p $=1.645\sqrt{\dfrac{0.2\times0.8}{300}}\\= 1.645\times\sqrt{0.00053333}\\\\=1.645\times0.0231\\\\=0.0379995\approx$$0.038$

Hence, the required margin of error = 0.038

7 0

3 years ago