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
Alexandra [31]
3 years ago
12

DOES ANYONE KNOW HOW TO DO THIS???

Mathematics
1 answer:
Anna11 [10]3 years ago
4 0

Answer:

Cost of a pound of chocolate chips: $3.5

Cost of a pound of walnuts: $1.25

Step-by-step explanation:

x - cost of a pound of chocolate chips

y - cost of a pound of walnuts

We create two equations based on the information we have:

3x+2y=13

8x+4y=33

The whole point of these problems os to get rid of x or y. In this question, we can do this by multiplying both sides of the first equation by 2, and then subtracting it from the second equation:

8x+4y=33

6x+4y=26

2x=7

x=3.5

Then we change x for 3.5 in the first equation:

3×3.5+2y=13

10.5+2y=13

2y=2.5

y=1.25

Hope this helps!

You might be interested in
Mr. Altamirano opens an account with a simple interest on an account with $1000 at 3% annually for 9 months. How much interest d
Aleksandr [31]

Answer:

$270

Step-by-step explanation:

Multiply 1000 by .03 or 3%. Then mulrioly that number by 9 because it is that amoint of interest for nine months.

3 0
3 years ago
What are all prime numbers x which:<br> x&lt;10
ivanzaharov [21]

Answer:

5,7,3,2

Step-by-step explanation:

It's pretty simple: a prime number is a number that can *only* be divided by the number 1 and it's own.

I just checked all the numbers from 1 to 10 in order to solve this problem.

If you have any questions about the way I solved it, don't hesitate to ask!

8 0
3 years ago
What is the value of x?<br><br> Enter your answer in the box. <br><br> x = ___
lapo4ka [179]
Answer:

x=8

Explanation:

The picture tells us that the triangle is equilateral (this means that each angle is 60°). We can assume this because each side has been marked with the same line.

Because each angle is equal to 60°, this means that:

7x+4=60

Now solve for x:

7x=56
x=8
5 0
3 years ago
Find an equation of the tangent line to the hyperbola y = 3/x at the point (3, 1).
Vesna [10]
Let's find the derivative of that hyperbola in order to find a slope formula to help us with this equation.  We already have an x and y value.  The derivative is found this way:  y'= \frac{x(0)-3(1)}{x^2} so  y'=- \frac{3}{x^2}.  The derivative supplies us with the slope formula we need to write the equation.  Sub in the x value of 3 to find what the slope is: y'=- \frac{3}{3^2}=- \frac{3}{9}=- \frac{1}{3}.  So in our slope-intercept equation, x = 3, y = 1, and m = -1/3.  Use these values to solve for b.  1=- \frac{1}{3}(3)+b  so b = 2.  The equation, then, for the line tangent to that hyperbola at that given point is y=- \frac{1}{3}x+2
6 0
3 years ago
Michelle and Natasha each had to repair their new iPhones. The initial cost of each repair is $ 100. Michelle and Natasha each h
worty [1.4K]

Answer:Michelle

And 50

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • What is the answer to 4x-4=5x+2?
    12·1 answer
  • Solve the equation x-6=8
    15·2 answers
  • What value of m makes the equation true?<br> 16 + 2 ( 5m -8 ) - m = 36
    7·2 answers
  • Simplify<br><br> (8d4)​​ (−8d4)<br> ​<br> ​​
    6·1 answer
  • Candidate A received 15,000 fewer votes than
    8·1 answer
  • 5) You randomly choose a marble from a jar. The jar contains 4 red
    12·2 answers
  • True or false:
    7·2 answers
  • Fine the areaof the rectangle ​
    9·1 answer
  • Can someone explain how I solve both of these? I’m sort of lost
    10·2 answers
  • Billy has 201 packages of postcards. Each package has 18 cards. Use rounding to estimate. About
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!