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
Margaret [11]
3 years ago
9

I am thinking of a number. when it is increasd by 7, it equals 21. what is my number

Mathematics
2 answers:
olga55 [171]3 years ago
8 0
Let the number be x;
x+7=21
Subtracting 7 from each side,
x+7-7=21-7
x=14
andrey2020 [161]3 years ago
6 0
If X is increased by 7 to make 21
X + 7 = 21
then rearrange the equation to get X
X = 21-7
X = 14(b)
You might be interested in
The number of peanuts in a 16-ounce can of Nut Munchies is normally distributed with a mean of 96.3 and a standard deviation of
andriy [413]
To calculate for the z-score we use the formula:
z=(x-μ)/σ
thus the answers to questions will be as follows:

a]<span>Carmen purchased a 16-ounce can of Nut Munchies and counted 100 peanuts. What is the z-score for this can of peanuts?
</span>x=100
μ=96.3
σ=2.4
z=(100-96.3)/2.4
z=1.542

b]<span>Angelo purchased a 20-ounce can of Gone Nuts and counted 116 peanuts. What is the z-score for this can of peanuts?
x=116
</span>μ=112.6
σ=2.8
<span>thus
z=(116-112.6)/2.8
z=1.214

c]</span><span>Carmen declares that purchasing her can of Nut Munchies with 100 peanuts is less likely than Angelo purchasing a can of Gone Nuts with 116 peanuts. Is Carmen’s statement correct? Use the definition of a z-score to support or refute Carmen’s claim.
This is very correct because because by definition of z-score, Munchies with 100 peanuts is 1.542 away from the mean as compared to Munchies with 116 peanuts which is 1.214 standard deviations from the mean hence the higher likelihood. </span>
6 0
3 years ago
Dr. Black is standing 15 feet from a streetlamp. The lamp is making his shadow 8 feet long. He estimates that the angle of evela
lina2011 [118]
The base of the triangle is 15 + 8 = 23 feet
 and the angle is 50 degrees
to find the height of the street lamp
 multiply the base ( 23) by the Tan(50)
tan(50) x 23 = 27.41 feet rounded to nearest foot would be 27 fee
 
4 0
4 years ago
Beatrice has 18 pencils. Beatrice has 2 more than 4 times the number of pencils Rick has. Exactly how many pencils does Rick hav
bekas [8.4K]
Rick has 4 pencils and beatrice has 18
3 0
3 years ago
Read 2 more answers
PLEASE HELP ME ANSWER THIS FAST! REWARDING THE MOST POINTS FOR BEST ANSWER!!!!!!!!!!
uysha [10]

Answer:

           \large\boxed{\large\boxed{\$ 17.60/hour}}

Explanation:

The <em>profit</em> will be the revenue less the cost.

The revenue will be the price times the number of items sold. <em>The price is $40 the piece</em>. Work with a piece.

  • Revenue = $40

The total cost of a piece is the sum of the <em>cost of the supplies</em>, the s<em>eller's fees</em> and the <em>shipping costs</em> of a piece:

  • Cost of supplies: $8.00
  • Seller's fee: 9% of $40 = 0.09 × $40 = $3.60
  • Shipping costs: $2.00
  • Total cost = $8 + $3.60 + $2 = $13.60

Profit = Revenue - Cost = $40 - $13.60 = $26.40

To find the <em>hourly profit</em> you must divide the profit of a piece by the <em>hours of labor</em> to make a piece.

  • Hourly profit = $26.40/1.5hour = $17.60/hour
3 0
3 years ago
A = 3 and c = 12 c/a =
Bess [88]

Answer:

4, because 12/3 is 4 cause 3×4=12

3 0
3 years ago
Other questions:
  • Can anyone help me with this algebra problem? Help is greatly appreciated!!
    9·1 answer
  • Find the slope of line that contains these two points ( 18, 10 ) and ( 29 ,5 )
    14·2 answers
  • What is the distance between the points (2,5) and (5,7)?
    11·1 answer
  • A small, upscale boutique examines the income of 10 random households to determine if the community will be a good location for
    8·1 answer
  • What 3 numbers that are greater than 12,000 but less than 13,000?
    13·1 answer
  • Depth d (in feet) of a river can be modeled by the equation d=−0.25t2+1.7t+3.5, where 0≤t≤7 and t is the time (in hours) after a
    9·1 answer
  • We have a bag filled with 201 marbles, of which100 of them are blue and 101 of them are red. Every turn, we remove 2 marbles fro
    6·1 answer
  • This is hard for me, can someone show me how, Find m∠UTS, if m∠UTV=x+15, m∠VTS=140∘, and m∠UTS=15x+15.
    7·1 answer
  • Ms.Maggie bought a 3\4 pound bag of chocolate chips. She used 2\3 of the bag to make cookies. How many pounds of chocolate chips
    9·1 answer
  • How to calculate algebraic expression?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!