1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nalin [4]
3 years ago
8

A metallurgist wants to make 130 grams of an alloy that is to be 20% copper. She has samples that are 14% copper and 22% copper.

How many grams of the sample that contains 14% should she use?
Mathematics
1 answer:
bija089 [108]3 years ago
8 0

Answer:

She should use 32.5 g of the sample that contains 14%

Step-by-step explanation:

Here, we want to know the number of grams of the sample that contains 14% copper that should be used

let the number of grams that contains 14% copper to be used be x

Then the number of grams of 22% will be 130-x

Thus, mathematically;

0.14(x) + 0.22(130-x) = 0.2(130)

0.14x + 28.6 - 0.22x = 26

0.22x - 0.14x = 28.6 - 26

0.08x = 2.6

x = 26/0.08

x = 32.5

You might be interested in
What is the volume of each small cube? And what is the volume of the right rectangular prism.
NeTakaya

Answer:

Cube = 1/64 in³

Rectangular Prism = 84 3/8 in³

Step-by-step explanation:

Volume of Each Small Cube = (1/4)³ = 1/64 in

Volume of the Rectangular Prism = 4.5 x 5 x 3.75 = 84.375 = 84 3/8

-Chetan K

3 0
2 years ago
Read 2 more answers
HELP!!!!PLZ!!!ASAP!!!
zubka84 [21]
That answer would be 143
7 0
3 years ago
Read 2 more answers
A delivery truck is transporting boxes of two sizes: large and small. The combined weight of the large box and a small box is 70
andre [41]

Answer:

3.45

Step-by-step explanation:

you have to do tihis then that

3 0
3 years ago
derek is practcing for a matathon by running around a track that is 440 yards long. Yesturday he ran around the track 20 times.
Alja [10]
The answer would be 5 miles. I hope this helped ^^


First, you take 440 and multiply It by 20

Then, you take the product (8800) and divide it by 1760

Which would then give you, 5
8 0
3 years ago
What is the probability of spinning a number greater than 7 or an odd number? (1 Point)
yaroslaw [1]
B) 7/10
It is B because there are 7 out of 10 possibilities that you would get a number greater than 7 or an odd number.
8 0
3 years ago
Other questions:
  • Convert the decimal 3.88888… to a fraction.
    10·1 answer
  • What is the area of the figure? Assume that all angles are right angles.
    13·1 answer
  • Which of the following represents the most accurate estimation of 438 + 614?
    9·2 answers
  • Tyron takes 3/4 hours to paint a wall. His brother takes 1/3 of the the time he takes.how long will his brother take to paint 5
    12·1 answer
  • What is the diameter of the circle whose center is at (6, 0) and that passes through the point (2, -3)?
    6·1 answer
  • An ocean aquarium is home to Gray whale that weighs 35 tons. How many pounds does the Gray whale weigh?
    12·1 answer
  • Robert stands atop a 1,380-foot hill. He climbs down, reaching the bottom of the hill in 30 minutes. What is Robert’s average ra
    9·2 answers
  • Equation of line through (-3,7) with slope of 4 is?
    11·1 answer
  • What of the following us a solution to the system of equations​
    5·1 answer
  • Nico makes annual end-of-year payments of $5,043.71 on a four-year loan with an interest rate of 13 percent. The original princi
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!