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]
4 years ago
12

Not good with word problems please help

Mathematics
1 answer:
Zepler [3.9K]4 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
Find the height of a square pyramid that has a volume of 8 cubic feet and a base length of 2 feet. . . a. 6 feet. b. 16 feet. c.
exis [7]
Volume a square pyramid is expressed as the one third of the product of the base area and the hight of the shape.

Volume = (1/3)*(base area)* height

Substituting the given values, we have:

(1/3)*(2 * 2) * h = 8

h = 8*3 / (2 * 2)

h = 6 ft

Therefore, the correct answer among the choices is option A.
3 1
4 years ago
Read 2 more answers
The equation yˆ=24.387x + 328.182 models Math SAT scores, y, where x is the number of hours spent studying.
Feliz [49]

Answer:

Without any studying, the score would be about 328

Step-by-step explanation:

The y-intercept of an equation represents the point where its graph crosses the y-axis. At this point the value of x is always equal to 0.

The y-intercept of the equation in this context would represent the Math SAT score of a student who did not do any studying, that is the number of hours spent studying, x = 0.

Substitute x = 0 in the given equation and solve for y;

y = 24.387(0) + 328.182

y = 328.182

Therefore, Without any studying, the score would be about 328

6 0
4 years ago
Solve for T.<br><br> 5/13=T-6/13<br><br> fraction not divide
Allisa [31]
Add 6/13 to both sides. T= 11/13
5 0
4 years ago
Read 2 more answers
Please help me thank you
laila [671]
Parallel lines have the same slope. The equation of the parallel line is therefore:

y = x + b

Plug in the values you are given to find b:

2 = -3 + b

b = 5
6 0
3 years ago
How do you find the area of the circle?
Lena [83]
It’s a semicircle, so it would be 1/2 pi r^2.
3 0
4 years ago
Read 2 more answers
Other questions:
  • PLS HELP ME ASAP FOR 1, 2, AND 3! (FIND X OR FIND THE SQUARE ROOT IF POSSIBBLE (?)
    14·1 answer
  • Megan buys condiments in bulk for her restaurant. The company that she orders ketchup from charges $14.78 per gallon for orders
    10·1 answer
  • Is 70% of 80 the same as 80% of 70
    15·2 answers
  • "Fuji apples sold for $1.29 per pound while Golden Delicious apples were on sale for $0.89 per pound. Sandi bought 3 1/2 pounds
    14·2 answers
  • A laptop has the listed price of $523.99 before tax if the sales tax rate is 8.25% find the total cost of the laptop with sales
    5·1 answer
  • A line that passes through the point (x,y), with a y-intercept of b and a slope of m, can be represented by the equation y = mx
    10·2 answers
  • 0.3(4-x)=x-1.4 how do you solve this problem?
    12·1 answer
  • Solve each linear system. Vertify each solution by substituting the coordinates of your solution into both equations. The questi
    12·2 answers
  • Use scientific notation to estimate the number of inches in 1,225 miles. Include all calculations in your final answer.
    15·1 answer
  • Find the area of a circle with radius, r =
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!