answer.
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
svp [43]
2 years ago
15

How much of a 90% alloy must be combined with 70% gold alloy in order to get 60 ounces of an 85% gold alloy?

Mathematics
1 answer:
Umnica [9.8K]2 years ago
4 0
X = amount of 90% alloy
y = amount of 70% alloy

x + y = 60
0.9x + 0.7y = 0.85*60

0.9x + 0.7(60 - x) = 0.85*60
(0.9 - 0.7)x = (0.85 - 0.7)*60
x = (0.85 - 0.7)*60/(0.9 - 0.7)
x = 45 ounces

y = 60 - 45
y = 15 ounces
You might be interested in
3.82e+7 in standard form shown in calculator display
ser-zykov [4K]
E+7 means 10^+7
basically move the decimal place 7 placs to right so it would be aprox
38200000.0
3 0
2 years ago
Read 2 more answers
4.5x-7=20 i need help whats the answer
Dmitry [639]
Your answer will be 6. 
7 0
2 years ago
Read 2 more answers
Lynn is making custom bricks. She combines 39 pounds of water and 48 pounds of brick dust in a mixing bucket. She spills 13 poun
ehidna [41]

Lynn mixes 39 pounds of water with 48 pounds of brick dust, so the mixture has a total weight of 39 + 48 = 87 pounds.

13 pounds are spilled during mixing, so she's left with 87 - 13 = 74 pounds to turn into bricks.

7 pounds are needed for 1 brick, so she can make 10 bricks because 7 • 10 = 70 and 7 • 11 = 77, and 70 < 74 < 77.

If she uses the mixture to make 10 bricks, she uses up 70 pounds of it, which leaves 4 pounds to be washed out.

5 0
2 years ago
A runner completes a 400-m race in 43.9 s. In a 100-m race, he finishes in 10.4 s. In which race was his speed faster?
Sveta_85 [38]

Answer:

100m race

Step-by-step explanation:

because 10.4 x 4 because 100m and 400m right 10.4x4=41.6 and 43.9 so obviously the 100m race is faster.

5 0
2 years ago
Read 2 more answers
A recipe calls for One-fourth cup of broth. The largest volume-measuring tool that Tabitha has is a teaspoon. She knows that the
djverab [1.8K]

<u>Answer:</u>

Tabitha will use 12 teaspoons.

<u>Explanation: </u>

According to the question, Tabitha has a largest volume-measuring tool teaspoon, and she wants to use one-fourth cup of broth.

Given that 1 cup consists of 16 tablespoons and 1 tablespoon has 3 teaspoons.

From the data, we can calculate that;

16 tablespoons will be equal to (3*16) = 48 teaspoons.

Therefore, 1 cup = 48 teaspoons.

Substituting the data and we can calculate that 1/4 cup = 48/4 = 12 teaspoons.

5 0
2 years ago
Other questions:
  • Which expression is an equivalent expression of 12x + 10 + 4y?
    8·1 answer
  • The polynomial 8x2 – 8x + 2 – 5 + x is simplified to 8x2 – gx – h. What are the value of g and h?
    9·2 answers
  • Linda makes booklets using 2 sheets of paper she has 17 sheets of paper how many more of these booklets can she make will she ha
    11·2 answers
  • Brittany surveyed the students in three different Chemistry classes regarding the average number of hours of sleep they get each
    5·2 answers
  • In a class of 32 students, the mean height of the 14 boys is 1.56 metres. The mean height of all 32 students is 1.515 metres.
    7·2 answers
  • Tamara and Clyde got different answers when dividing 2x4 + 7x3 – 18x2 + 11x – 2 by 2x2 – 3x + 1. Analyze their individual work.
    11·2 answers
  • How does the range of g (x) = StartFraction 6 Over x EndFraction compare with the range of the parent function f (x) = StartFrac
    13·2 answers
  • Identify the height of the rectangle, in which A=200x2 m2.
    14·1 answer
  • Robert makes $951 gross income per week and keeps $762 of it after tax withholding. How many allowances has Robert claimed? For
    8·1 answer
  • Information from a sample of 157 restaurant bills collected at the First Crush bistro is available in RestaurantTips. Two interv
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!