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
noname [10]
3 years ago
10

Is x = 7 a solution to the equation 3x = 21? yes no WHICH ONE??

Mathematics
2 answers:
cricket20 [7]3 years ago
5 0

Answer:

Yes

Step-by-step explanation:

because when you plug in 7 it equals 21, so x=7 is a solution

Veronika [31]3 years ago
4 0

Answer:

yes.

Step-by-step explanation:

if you plug 7 into x it'll be 3x7 and that will equal 21

You might be interested in
Heights (in centimeters) and weights (in kilograms) of 7 supermodels are given below. Find the regression equation, letting the
Delvig [45]
The regression equation:
y = m x + b
m = ( 57 - 50 ) / ( 178 - 168 ) = 7 / 10 = 0.7
50 = 0.7 * 168 + b
50 = 117.6 + b
b = 50 - 117.6
b = - 67.6
y = 0.7 * x - 67.6
The graph is in the attachment.
The weight of supermodel who is 171 cm tall:
y = 0.7 * 171 - 67.6 = 119.7 - 67.6 = 52.1 kg
Download docx
6 0
3 years ago
How do you figure it out in steps 3r+n^2-r+5-2n+2
Katyanochek1 [597]
If you need to simplify the equation it would be:
n^{2}+2r-2n+7
If not sorry..
Hope This Helps!
8 0
4 years ago
Please help and show how :) i will mark you brainliest please help​
levacccp [35]

It is the fourth one because n could be any number on that red line because it’s is greater than -3

4 0
3 years ago
Read 2 more answers
Justify conclusion on why 2 ounces of ketchup is ok to use when eating potatoe wedges
ikadub [295]
Well you haven't really given us a question that requires a "quantifiable" answer. 2 ounces is roughly equivalent to 60 grams. 2 ounces of ketchup wouldn't be an awful lot of ketchup. I'm sure that you'd remain healthy despite eating 2 ounces of ketchup along with your potato wedges.

According to the American Heart Association, women should only have about 25 grams of sugar per day. In 100g of ketchup there would be about 22g grams of sugar. If you were to eat roughly 60g of ketchup, you'd only be digesting about 13.2 grams of sugar. Now, potato wedges could also contain sugar, but you haven't stated how many grams or kilograms of potato wedges you'd be eating, so I wouldn't be able to tell you whether your meal contains too much sugar.
4 0
3 years ago
PLEASE SHOW FULL SOLUTIONS !!!!! WILL MARK BRAINLIEST FOR THE BEST ANSWER. THANK YOU AND GOD BLESS
yanalaym [24]

Answer:

  • System is given below

Step-by-step explanation:

  • Let (applicable to all three lines below)
  • Hard candy = x kg with price $1.60/kg
  • Gummy worms = y kg with price $2.20/kg
  • Total weight = 50 kg with mixed price $1.75/kg

<u>Required equations:</u>

  • x + y = 50                        total weight
  • 1.60x + 2.20y = 50*1.75      total price

=========================================

<u><em>Note</em></u><em>. It says don't solve but the solution below for those who is interested to know the answer.</em>

<u>Simplify the second equation and solve by substitution x = 50 - y:</u>

  • 1.6(50 - y) + 2.2y = 87.5
  • 80 - 1.6y +2.2y = 87.5
  • 0.6y = 7.5
  • y = 7.5/0.6
  • y = 12.5

<u>Find the value of x:</u>

  • x = 50 - 12.5 = 37.5

<u>Hard candy</u> = 37.5 kg and <u>gummy worms</u> = 12.5 kg

7 0
3 years ago
Other questions:
  • 6 as a fraction of 15
    9·2 answers
  • Points A(7-5), B(-1,-2), and C(-4, 6) form triangle ABC on a coordinate plane. According to its sides, triangle ABC is a(n)
    14·1 answer
  • PLEASE HELP!! 20 POINTS WORTH
    15·1 answer
  • 4x^2+4x+1=9 solutions
    13·1 answer
  • 32.45 x 827.33 help??
    15·2 answers
  • write an expression where you multiply 0.035 times the power of ten so that the product is greater than 1 and less than 100 plea
    6·1 answer
  • Two functions, function A and function B, are shown below:
    12·2 answers
  • Type the correct answer in the box.
    9·1 answer
  • Find the slope of the line whose equation is 5y = x - 3.<br> 5<br> -3<br> -3/5<br> 1/5
    5·1 answer
  • letter H represent marks height in inches Suzanne is 7 in shorter than Mark write an algebraic expression that represents Susan'
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!