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
ElenaW [278]
3 years ago
13

I need an answer for this lolz

Mathematics
1 answer:
Afina-wow [57]3 years ago
8 0

Answer:

She worked 12 hours as a carpenter and 18 hours as a blacksmith

Step-by-step explanation:

You can solve this problem using a system of equations:

where c represents hours worked as a carpenter, and b represents hours worked as a blacksmith;

c + b = 30

20c + 25b = 690

To solve this system, you can multiply the first equation by 20 and subtract it from the second to isolate b:

  20c + 25b = 690

<u>- 20c + 20b = 600</u>

              5b  = 90

Now, you can solve for b:

5b = 90

b = 18 (divide both sides by 5)

Now that you know b, you can input it into the first equation to find c:

b + c = 30, where b = 18;

18 + c = 30 (replace b in the equation with 18 because of transitive property of equality)

c = 12 (subtract 18 from both sides of the equation))

You might be interested in
Solve the inequality.
Vika [28.1K]

Answer:

Option C is correct

Step-by-step explanation:

      5c – 20 ≤ 15c + 10

<=> 5c - 15c ≤ 20 + 10

<=>-10c ≤ 30

<=> c ≥ -3

Hope this helps!

6 0
3 years ago
Read 2 more answers
-3x=x-(6-2x) explain how asap, please!!
OLEGan [10]
Answer: x=1
-3x=x-6+2x
-6x=-6
x=1
7 0
2 years ago
Verify that the given value is the solustion of the equation x=6 for 2z-4=8​
klemol [59]

Answer:

8-4=2z.. 2z+4=6 so x=6

6 0
3 years ago
A quality control worker checked that 3 out of 40 TVs are defective(do not work).
gregori [183]

Answer:

600

Step-by-step explanation:

Divide 8000 by 40 then multiply by 3

4 0
3 years ago
Read 2 more answers
Write an expression that represents the volume of a rectangular-shaped box with a length 3 inches less than its height and a wid
AfilCa [17]

The expression that represents the volume of a rectangular-shaped box is: A. x³ + x² - 12x.

<h3>What is the Volume of a Rectangular Prism?</h3>

A rectangular-shaped box is a rectangular prism. To find the volume of a rectangular-shaped box, we would apply the formula of the volume of a rectangular prism, which is expressed as: V = (length)(width)(height).

We are given the following dimensions of the rectangular-shaped box:

Let the height be represented as x

Height of the rectangular-shaped box = x in.

Length of the rectangular-shaped box = (x - 3) in.

Width of the rectangular-shaped box = (x + 4) in.

Plug in the values into the volume formula:

Volume of the rectangular-shaped box = (x - 3)(x)(x + 4)

Expand (x - 3)(x)(x + 4)

Volume of the rectangular-shaped box = x³ + x² - 12x.

Therefore, the expression that represents the volume of a rectangular-shaped box with the given dimensions is: A. x³ + x² - 12x.

Learn more about the volume of rectangular prism on:

brainly.com/question/12917973

#SPJ1

5 0
1 year ago
Other questions:
  • An investment is currently worth 2.125×104 dollars . Ten years ago, the investment was worth ​ 1.25×103 ​ dollars. How many time
    12·2 answers
  • A value two standards deviation from the mean is more likely to occur than a value three standard deviations from the mean.
    15·2 answers
  • The distance from a focus to a vertex on the graph of a parabola is not the same as the distance from vertex to a perpendicular
    8·1 answer
  • Fill in the blank j,l,I,j,h,h,g,_,f,d
    6·2 answers
  • 49 points <br> I don't get my homework <br> What is 968700 + 754800
    11·2 answers
  • the cost to take a class at a local community college is $169 per credit. Write an expression to represent the cost o a class ba
    15·1 answer
  • Find measure of &lt;_B.
    8·1 answer
  • WILL GIVE BRAINLIEST
    13·2 answers
  • I really need help for this question (Part B), I would appreciate any help thank you.
    11·1 answer
  • Dan is watching the birds in his backyard. Of the birds he watches, 9 of them, or 45%, are sparrows. How may birds are in his ba
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!