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
Tpy6a [65]
4 years ago
11

Ms. Johnson asked her class to write an equivalent

Mathematics
1 answer:
Anni [7]4 years ago
8 0
<span>Ahmad wrote the correct expression.
To prove that </span>7(2d + 3k - dk) - 7 is equal to 14d - 9 + 21k - 7dk + 2
Please check this solution:
7(2d + 3k - dk) - 7 = <span>14d - 9 + 21k - 7dk + 2
</span>7(2d + 3k - dk) - 7 = 14d + 21k - 7dk -9 + 2
7(2d + 3k - dk) - 7 = 14d + 21k - 7dk -7

Get the common variable which is 7.
7(2d + 3k - dk) - 7 = 7(2d + 3k - dk) - 7

For checking, we can simplify the equation...
from 7(2d + 3k - dk) - 7 = 14d - 9 + 21k - 7dk + 2
We simplify it to:
7(2d + 3k - dk) - 7 = 14d + 21k - 7dk -7
7 * 2d = 14d
7 * 3k = 21k
7 * - dk = -dk

Therefore, 
7(2d + 3k - dk) - 7 is equal to 14d + 21k - 7dk -7
You might be interested in
Determine the circumference of<br>a circle with diameter 28 cm. Show your work​
gulaghasi [49]

Answer:

Step-by-step explanation:

Diameter = 28 cm

therefore, radius = 28 / 2 = 14 cm

Circumference = 2 π r

= 2 × 22 / 7 × 14

= <u><em>88 cm</em></u>

Hope this helps

plz mark as brainliest!!!!!

8 0
3 years ago
Read 2 more answers
Find the sum of the first 5 terms of the infinite series: 8 + 18 + 28 +
Anna007 [38]

Answer:

8 + 18+ 28+ 38+ 48= 140

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
I need this asap
erik [133]

Answer:

20

Step-by-step explanation:

The rectangle is 2 x 8.

2 + 2 + 8 + 8

8 0
3 years ago
A student saves $3 dollars on August 1, $5 on August 2, $7 on August 3, and so on. How much will she save in August 20 ?
Delvig [45]
Here is your answer

Money saved on each successive day is-

$3, &5, $7....

Clearly it forms an AP,

where

a1= 3

common difference, d= 2

n=20

So,

using formula

Tn= a1+(n-1)d

T20= 3+(20-1)2

= 3+ 19×2

= 3+ 38

=41

So, money saved on August 20= $41

Sum of money saved upto August 20 =
n/2 (a1+T20)
= 20/2 (3+41)
= 10× 44
= $440

HOPE IT IS USEFUL
5 0
3 years ago
Read 2 more answers
18x2 + 50 = 0<br> What are the solutions and how do you get them ?
Artist 52 [7]

Answer:86

Step-by-step explanation:

You would do multiplication first so 18x2 = 36 then you would add 36+50 which equals 86

7 0
3 years ago
Read 2 more answers
Other questions:
  • In a college student poll, it is of interest to estimate the proportion p of students in favor of changing from a quarter-system
    9·1 answer
  • Find the value of the expression (-101)+102+(-103)+104+...+(-199)+200. (with steps)
    14·1 answer
  • Express the fraction as a percent. Round to the nearest tenth of a percent if necessary. 31/50
    15·1 answer
  • A train travels at a speed of 45 kmph. In 48 minutes, how much distance will it travel? ( with explanation )
    14·2 answers
  • Which answer is the best estimate of g based on rounding the constants and coefficients in the equation to the nearest integer?
    7·1 answer
  • Multiply. 32√⋅28√⋅3√⋅6√ Enter your answer, in simplest radical form, in the box.
    9·1 answer
  • A rectangular pan has a length that is the width. The total area of the pan is 432 in.2. What is the width of the cake pan? A =
    6·1 answer
  • Is 16 a prime or composite number
    14·2 answers
  • There are 56 boys and 72 girls in an after-
    6·1 answer
  • RuiFeng is twice as old as Raj and Khairul is 7 years younger than RuiFeng. If the sum of their ages is 38 years, find their res
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!