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
LenaWriter [7]
3 years ago
13

In the equation 2r - 7 = 15, what value of r makes this equation true?

Mathematics
1 answer:
erastovalidia [21]3 years ago
3 0

Answer:

11

Step-by-step explanation:

2r - 7 = 15

2r = 15 + 7

2r = 22

r = 22 / 2

r = 11

You might be interested in
Solve for x.<br> Worth 20 pts.
Vinvika [58]
You’d set up a proportion. I did 25/15=7x-40/18.
Then you would cross multiply to get 15(7x-40)=450
Distribute the 15.
105x-600=450
Add 600 to both sides, so the -600 cancels out.
Then you’re left with 105x=1050
Divide both sides by 105 and you get x=10
6 0
3 years ago
Find the fourth roots of 256(cos 240° + i sin 240°).
Mashcka [7]

Answer with Step-by-step explanation:

We are given that

We have to find the fourth roots of given complex number.

(256)^{\frac{1}{4}}=(4^4)^{\frac{1}{4}}=4^^{\frac{1}{4}\times 4}=4

By using the formula

(a^b)^x=a^{bx}

\theta=240^{\circ}

\theta=\frac{240}{4}=60^{\circ}

Angle of rotation=\frac{360}{4}=90^{\circ}

Therefore, the four roots of given complex number are

4(cos 60^{\circ}+i sin60^{\circ})

4(cos150^{\circ}+i sin150^{\circ})

4(cos240^{\circ}+isin 240^{\circ})

4(cos330^{\circ}+i sin330^{\circ})

8 0
3 years ago
Let B=[-1 3 6 -3].Find-4B.
vaieri [72.5K]

The product of a scalar and a matrix is found by multiplying each element of the matrix by the scalar. Multiply each element by -4.

... [4 -12 -24 12]

4 0
3 years ago
Find the unit rate. round to the nearest hundredth, if necessary.<br><br>$360 for 13 ft2 ​
lidiya [134]

what

Step-by-step explanation:

5 0
3 years ago
What is the area of the triangle
ehidna [41]

Answer:

45.1 km^2

hope this helps

have a good day :)

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the area of a regular pentagon with an apothem of 25.1 and a perimeter of 182mm
    12·1 answer
  • What is a expression that represents the sum of 7 and x
    6·1 answer
  • ALGEBRA ONE!!!!!1 34 POINTS I WILLLLL GIVE TOOOO YOUUUUU!!
    10·2 answers
  • What is the quotient of 3/4 divided by 5/6
    6·2 answers
  • Expand and simplify (2x - 3)(3x + 4)
    14·2 answers
  • Please help you don't have to show work
    10·1 answer
  • Simultaneous equations 5x-4y=19<br> X+2y=8
    13·1 answer
  • What's the slope of the equations y = 2/3x + 5?
    13·1 answer
  • 2/5 m = ____ cm<br><br><br><br> 5/6 year = _____ months <br><br><br> ONLY IN FRACTION
    9·1 answer
  • 100 POINTS!!!!! WILL GIVE BRAINLIEST!!!!!!! <br> Show that: (a + bi)^2 = (a + b)(a − b) + 2abi
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!