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
Bess [88]
3 years ago
8

−2 1/4=r−4/5 What is r?

Mathematics
1 answer:
dmitriy555 [2]3 years ago
4 0

Answer:

r = -29/20 or r = -1.45

Step-by-step explanation:

I believe you are saying that the equation is -2 1/4 = r - 4/5. If so, then I would solve it in this way:

-2 1/4 = r - 4/5

-9/4 = r - 4/5

-9/4 (20) = r (20) - 4/5 (20)

-45 = 20r - 16

20r = -29

r = -29/20

r = -1.45

Check:

-2 1/4 = r - 4/5

-9/4 = r - 4/5

-2.25 = r - 0.8

-2.25 = -1.45 - 0.8

-2.25 = -2.25

-9/4 = -9/4

You might be interested in
John bought 3 pencils for $0.75 each and a notebook for $4.25. If the tax rate is 5%, what is the total amount of John's purchas
SIZIF [17.4K]

Answer:

$6.83

Step-by-step explanation:

First calculate the before-tax total amount:

$0.75 + $0.75 + $0.75 + $4.25, or

3($0.75) + $4.25 = $2.25 + $4.25 = $6.50    (total before tax)

The before-tax total PLUS the 5% tax comes to:

$6.50 + 0.05($6.50) = $6.50 + $0.33  =  $6.83

7 0
3 years ago
Solve the following equation by COMBINING LIKE TERMS FIRST: 3x + 3 - x + 4 = 21
bonufazy [111]
3x + 3 - x + 4 = 21

3x - x = 2x

2x +3 +4 = 21

3 + 4 = 7

2x + 7 = 21
      -7    -7

2x = 14
---    ----
2       2

x = 7
8 0
3 years ago
Draw and label all three side lengths and angle measures of a right triangle that has a 40° angle and a hypotenuse 10 cm long.
Elodia [21]

Answer:

Right Triangles and the Pythagorean Theorem

1.The Pythagorean Theorem, a2+b2=c2, a 2 + b 2 = c 2 , can be used to find the length of any side of a right triangle.

2.The side opposite the right angle is called the hypotenuse (side c in the figure).

4 0
2 years ago
An eagle is flying around and its velocity vvvv as a function of time tttt is given in the graph below where rightwards is the p
mojhsa [17]

9514 1404 393

Answer:

  8 units

Step-by-step explanation:

Displacement is the area under the velocity curve. The area of interest is in the shape of a trapezoid, so we can use the formula ...

  A = (1/2)(b1 +b2)h

to find the area.

Here, b1=3, b2=1, h=4, so the area is ...

  A = (1/2)(3 +1)(4) = 8

The displacement is 8 units in the time from t=1 to t=4.

7 0
3 years ago
Solve the simultaneous equation :<br><br> 4x+2y=17<br> 3x+2y=14
enot [183]

Answer:

(x, y) = (3, 5/2)

Step-by-step explanation:

4x+2y=17\\3x+2y=14

I'll solve by elimination here. If you invert the second equation and add it to the first, 2y and -2y would cancel out.

4x+2y=17\\-(3x+2y=14)

Now just add those from top to bottom.

\rightarrow (4x-3x)+(2y-2y)=17-14\\\rightarrow x=3

Nothing else needs to be done for that part. Now, you can pick either equation and use the known value of x to solve for y.

4x+2y=17\\\rightarrow 4(3)+2y=17\\\rightarrow 12+2y=17\\\rightarrow 2y=5\\\rightarrow y=\frac{5}{2}

(x, y) = (3, 5/2)

6 0
2 years ago
Other questions:
  • Lea and kim each improve their yard by planting daylilies and shrubs. they bought their supplies from the same store. lea spent
    13·1 answer
  • Evaluate n+2x2 when n=3 and x=−2.
    9·1 answer
  • Simplify:(-<br> 17)^8÷(-17)^2
    12·1 answer
  • You have 2 positive numbers. One number is one-fifth of the other number. The difference between the two numbers is 228, find th
    9·1 answer
  • You are running a race. The probability that you win is 3/5. What is the probability that you lose at most 2 out of your 6 races
    12·1 answer
  • PLEASE HELP!
    15·1 answer
  • If the price of a yo-yo in a shop increased by 20% and is now $6.00, what was the original price?
    8·1 answer
  • The driving distance from Los Angeles to a Chicago is 2,054 mi. The distance from Chicago to Boston is 983 mi. About how many mi
    6·1 answer
  • nick spent 3 hours writing a report. evan spent 5/8 as long as nick on the same assignment. how long did evan spent writing his
    9·2 answers
  • Helpppppppppppppppppp
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!