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
-BARSIC- [3]
3 years ago
12

Not good with word problems please help

Mathematics
1 answer:
Zepler [3.9K]3 years ago
5 0

Let a and b be the respective rates in bricks per minute for Alex and Bob separately.

Alex lays 4 bricks per minute more than Bob

a = b + 4

Working together, their rates scale by 3/4 and they achieve 15 bricks per minutes.

(3/4)(a + b) = 15

Two equations, two unknowns, we solve:

b = a - 4

(3/4)(a + a - 4) = 15

2a - 4 = (4/3) 15 = 20

2a = 24

a = 12

b = a - 4 = 8

Answer: Alex alone does 12 bricks per minute, Bob alone 8 bricks per minute

Check:  a=b+4, good

(3/4)(12 +8)=(3/4)(20)=15, good


You might be interested in
Can someone help me with this
antiseptic1488 [7]
Your answer is A

24.6
5 0
3 years ago
PLSSSS HELLLPPP WILL GIVE BRAINLIESTTT!!!!!!!!!
Lerok [7]

Answer: -3/2

Step-by-step explanation:

There are two methods to find the slope

METHOD 1. Rise/Run

Rise: the y-axis value

Run: the x-axis value

In the graph, rise/run=3/2

The line is going down, so it should be negative

-3/2

Hope this helps!! :)

Please let me know if you have any question or need further explanation

5 0
3 years ago
A management company opens a large apartment complex in anticipation of growth in the community. The company compiles statistics
bezimeni [28]
The equation is given to us in slope intercept form. -34.85 is the slope and the y-intercept is 938.

Therefore, we can say:
The rate of change for the line of best fit is -34.85 which represents the decrease in number of available apartments per week since the complex opened.
The y-intercept is 938 which represents the number of apartments when it first opened.
7 0
3 years ago
-12°F+ -23°F please don't let me down
coldgirl [10]

Plus a negative value becomes subtraction:

-12 + -23 = -12 -23 = -35

3 0
3 years ago
A microscope can magnify the object it is looking at 10×4 times. How many times is that? (MCC.8.EE.3) A. 40,000 times B. 40 time
damaskus [11]

Answer:

10×4 = 40

10^4 = 10,000

Step-by-step explanation:

10^4 is another way to write 10⁴ = 10·10·10·10 = 10,000.

Essentially, the exponent tells you how many places to the right of the leading digit the decimal point lies (here, the number of zeros in the number).

_____

<em>Comment on the answer choice</em>

The appropriate answer depends on what you mean by your problem statement. Some microscopes magnify 40 times; others magnify 10,000 times, so we cannot tell the appropriate answer using our knowledge of microscopes.

3 0
3 years ago
Other questions:
  • Over the past several years, the proportion of one-person households has been increasing. The Census Bureau would like to test t
    14·1 answer
  • Factor this expression completely.
    5·1 answer
  • Require full steps working for this question
    10·1 answer
  • A chord divides a circle into two segments true or false?
    10·2 answers
  • A box contains orange balls and green The number of more four the number of orange If there 38 balls how many green balls and ho
    14·1 answer
  • What is the greatest common factor of 42 and 15?
    5·2 answers
  • En la finca de los padres de un amigo han sacado un total de 18.367,42 kg de aceitunas. Ellos tienen 648 olivos. ¿Cuántos kg de
    5·1 answer
  • The duration of routine operations at chicago general hospital has approximately a normal distribution with an average of 130 mi
    15·1 answer
  • Three times a number, subtracted from 20, is equal to -7
    9·1 answer
  • What is the sum of -4/7 and 6/7<br><br> A) -2/7<br><br> B) 2/7<br><br> C) -10/7<br><br> D) 10/7
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!