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
EleoNora [17]
4 years ago
7

An alloy weighing 30 lbs. is 11% tin. The alloy was made by mixing a 15% tin alloy and a 9% tin alloy. How many pounds of each a

lloy were used to make the 11% alloy?
Mathematics
1 answer:
Roman55 [17]4 years ago
3 0

Answer:

20 lbs of 9%

10 lbs of 15%

Step-by-step explanation:

x: 9%

y: 15%

x + y = 30

y = 30 - x

0.09x + 0.15y = 0.11(30)

0.09x + 0.15(30 - x) = 3.3

-0.06x = -1.2

x = 20

y = 10

y = 30 - x

You might be interested in
Evaluate zx-xy-7 use x=-3, y=8, and z=-9*​
trapecia [35]

Answer:

44

Step-by-step explanation:

1. substitute variables with their constants

(-9)(-3) - (-3)(8) - 7

2. multiply all like terms

(27) - (-24) - 7

3. Combine all like terms

27 + 24 - 7

51 - 7

= 44

8 0
3 years ago
Read 2 more answers
after a school election,Jamie had 3/8 of the votes Richard the only other candidate had 75 votes how many people voted for jaime
dalvyx [7]
Jamie and Richard are the only contestants of the election.

Jamie got 3/8 of the total votes.

Richard got = 1 - 3/8 = (8-3)/8 = 5/8 of total votes

Number of votes Richard got = 75

So 5/8 of total votes = 75

Total votes = 75 ÷ 5/8 = 75 × 8/5 = 120

Jamie got = 120 - 75 = 45 Votes
8 0
4 years ago
How do you find your y-intercept from your x-y points?
PSYCHO15rus [73]
1. To determine the x-intercept, we set y equal to zero and solve for x. Similarly, to determine the y-intercept, we set x equal to zero and solve for y. ...

2. To find the x-intercept, set y = 0 \displaystyle y=0 y=0.

3. To find the y-intercept, set x = 0 \displaystyle x=0 x=0.
5 0
2 years ago
In what ways can horizontal, vertical, and oblique asymptotes be identified?
antiseptic1488 [7]
A horizontal asymptote y = a is a horizontal line which a curve approaches as x approaches positive or negative infinity. If the limit of a curve as x approaches either positive or negative infinity is a, then y=a is a horizontal asymptote.

A vertical asymptote x = b is a vertical line that a curve approaches but never crosses. The value b is not in the domain of the curve. More precisely if the limit of a curve as x approaches b is either positive or negative infinity then x=b is a vertical asymptote.

An oblique asymptote is a diagonal line (a line whose slope is either positive or negative) that a curve approaches. For a rational function R(x) = P(x) / Q (x) an oblique asymptote y = my + b is obtained by dividing P(x) by Q (x). Doing so will yield a quotient and remainder. If we set the quotient equal to y that gives the equation of the oblique asymptote.
3 0
3 years ago
Whats the vertex of x^2-12x+23
abruzzese [7]

Answer:

y=(x-6)^2-13

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • HELP ! I've been stuck on this for over 15 mins. :(
    6·1 answer
  • Need help with 2&3 I don't get ir
    11·2 answers
  • Find the cube roots of 27(cos 279° + i sin 279°).
    7·1 answer
  • If PR = 25 and PQ = 12, then QR=
    15·2 answers
  • the shapes below are drawn on a centimeter grid, show that the triangle and the square have the same area.
    13·1 answer
  • Points (-21, 5) and (-7,y) have a slope of 5. Find the y coordinate of the point.
    8·1 answer
  • If I could I would all y’all a million points for helping me thank you TwT
    13·1 answer
  • Please help and solve; big points<br> 3/2 ∜(2(x-6)^3 )+4=16
    10·1 answer
  • The diagram shows a 9cm x 7cm rectangle-based pyramid. all the diagonal sides - TA, TB, TC, AND TD- are length 12cm. M is the mi
    7·1 answer
  • What is 0/0and is it even solved
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!