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
Ede4ka [16]
3 years ago
15

7(3r - 1) - (r + 5) = -52 Please step by step help

Mathematics
2 answers:
dmitriy555 [2]3 years ago
7 0

Answer:

r = -2

Step-by-step explanation:

7(3r - 1) - (r + 5) = -52 distribute (the - sign too)

21r - 7 + -r - 5 = -52 add/ subtract like terms

20r - 12 = -52 subtract -12 and added to -52

     +12      +12

20r = -40 divide by 20

20r/20 = -40/20

r = -2

MrMuchimi3 years ago
4 0
7(3r-1)-(r+5)=-52

21r-7-r-5=-52

21r-r-5-7=-52

20r-12=-52

Add 12 to both sides

20r=-40

Divide by 20

r=-2
You might be interested in
Choose the correct product of (6x − 2)(6x + 2). (1 point)
Vanyuwa [196]
You did not give any choices but this can easily be solved using the FOIL method. 

FOIL stands for First, Outside, Inside, Last. 

In your equation you have (6x-2)(6x+2)
You will multiply the terms that correspond to each letter 

First: Means first terms of each set. In this case 6x and 6x
6x x 6x = 36x^{2} Now you have your first term in the sequence.

Outside: Means terms found in the outside areas of the whole equation, in this case it is 6x and 2
6x x 2 = 12x Now this is the second term

Inside: Means terms found in the inside areas of the whole equation, in this case it is -2 and 6x
-2 x 6x = -12x Now this is your third term

Last: Means the last terms of each set. In this case it is -2 and 2
-2 x 2 = -4  This is your last term

Now you have what you need for your new equation:

36x^{2} + 12x -12x - 4

Because your second and third terms are like terms, you can combine them by doing the operation indicated. 12x-12x = 0 so now you can cancel it out from your equation and your left with:

36 x^{2} - 4 This is your product
6 0
3 years ago
Please help me......<br><br>​
LenKa [72]

Answer:

C. m ≥ 9

Step-by-step explanation:

7m -2 ≥ 61

7m ≥ 61+2

7m ≥ 63

m ≥ 63/7

m ≥ 9

7 0
2 years ago
A three-dimensional array can be thought of as ______ of two-dimensional arrays.
Iteru [2.4K]
A page of two-dimensional arrays can be thought of as a three-dimensional array. Since 2-dimensional arrays are commonly expressed in tables or matrixes, therefore, if we put these tables or matrices in a page, the collection of matrices in a single page would now be structured into a 3D array.
6 0
3 years ago
Find the measures of angles x and y please!?
kenny6666 [7]

Answer:

y: 139 x: 139 too

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
X-y=-3<br> I just kinda need the answer
bezimeni [28]

Just so you know, you have to know at least one of the variables to find out what the other is. Like for example, X could equal 2, so that would make y equal 5. Or X could equal 23, and that would make y equal 26.

5 0
3 years ago
Other questions:
  • Como resolver 4 2/3 - 1 1/2 +7
    8·2 answers
  • Sue has 1/2 gallon of milk to share evenly among four people. How much milk, in gallons, should she give each person?
    8·1 answer
  • Simply 9+3(8-3(7-5))-4
    6·1 answer
  • Coach Joel recorded the amount of time his runners take to run a mile in practice. If, on average, they can run it in under 7 mi
    7·2 answers
  • What is the value of x to the nearest tenth? <br><br> 12.0<br><br> 7.2<br><br> 4.8<br><br> 9.2
    11·2 answers
  • - 12 = 2 + 5d + 2d <br> ................
    14·2 answers
  • If 60% of a number is 90, what is 4/5 of the <br>number?​
    11·1 answer
  • Two triangles are similar.The the smaller triangle has side 10,20 and 15 units the larger triangles longest side is 52 units.Wha
    5·1 answer
  • What is 22÷638 i need help plz
    11·2 answers
  • Find the value of x
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!