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
Airida [17]
3 years ago
10

What is the value of x when x + 7 = 21?

Mathematics
2 answers:
sergij07 [2.7K]3 years ago
6 0

Answer:14

Step-by-step explanation:

x + 7 = 21

group like terms

x = 21 - 7

When positive cross = sign it turns negative

x = 14

Yuki888 [10]3 years ago
4 0
X + 7 = 21

- 7 - 7

x = 14
You might be interested in
The diagonals of a square are 4 meters long. The side of this square is equal to the diagonal of a second square. Find the side
jok3333 [9.3K]
Check the picture below.

since the second figure is also a square, then the sides touching the diagonals have to be all equal, and that'd only happen if those sides bisects the larger square's diagonal.

3 0
3 years ago
What is the equation for photosynthesis v= 1/3 bh gives the volume v of a pyramid, where b is the area of ther base and h is the
Arlecino [84]
V = 1/3 bh
3V/h = b
.........,....
3 0
3 years ago
Suppose that demand in period 1 was 7 units and the demand in period 2 was 9 units. Assume that the forecast for period 1 was fo
Zepler [3.9K]

Answer:

Step-by-step explanation:

Forecast for period 1 is 5

Demand For Period 1 is 7

Demand for Period  2 is 9  

Forecast  can be given by

F_{t+1}=F_t+\alpha (D_t-F_t)

where

F_{t+1}=Future Forecast

F_t=Present\ Period\ Forecast

D_t=Present\ Period\ Demand

\alpha =smoothing\ constant  

F_{t+1}=5+0.2(7-5)

F_{t+1}=5.4

Forecast for Period 3

F_{t+2}=F_{t+1}+\alpha (D_{t+1}-F_{t+1})

F_{t+2}=5.4+0.2\cdot (9-5.4)

F_{t+2}=6.12  

8 0
3 years ago
In triangle ABC below, BD is the altitude. Point A represents Omari's house, point C represents the restaurant where Omari works
tester [92]

Answer:

B

Step-by-step explanation:

B

4 0
2 years ago
Sam weights 51kg. What is this weight to the nearest stone?. Use this conversion, 1kg= 2.2 pounds and 14 pounds= 1 stone
padilas [110]

Answer:2

Step-by-step explanation:ω

7 0
3 years ago
Other questions:
  • PLEASE TELL ME WICH ONE
    7·1 answer
  • Round 983.625 ; hundredths
    14·1 answer
  • What is the value of the expression 8.3 × 104 − 2.5 × 103 − 1.9 × 104 written in scientific notation?
    12·2 answers
  • Evaluate the following expression: (7+5b)+1 , if b = 3
    13·1 answer
  • What is the property of 8x1 = 8
    8·2 answers
  • Dylan has a coworker who is always showing up late and then not finishing his work on time. It's frustrating the other members o
    12·1 answer
  • The balance of Micah's checking account is $645. Micah needs at least $800 in the account to cover his expenses. Write and solve
    6·1 answer
  • Help! write the set of numbers in set-builder notation: the set of all real numbers except 100​
    10·2 answers
  • Quisssssss :'^(<br><br>A = 10<br><br>2A + 4A - 3A​
    6·2 answers
  • What's this....?<br> 5(x+9)=60
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!