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
Kitty [74]
4 years ago
15

If a certain number is multiplied by five, the result is the same as twenty-one plus twice the original number. What is the valu

e of the original number?
Mathematics
2 answers:
expeople1 [14]4 years ago
6 0
7
7 times 5 = 35
21 + 14 (7*2) = 35
Zepler [3.9K]4 years ago
4 0
Let the number be x

a.t.g.c
            5x = 21+ 2x
            5x-2x = 21
            3x    =   21
             
             x    =   21/3
    
             x    =   7      give me brainliest
You might be interested in
A quadrilateral is a four sided polygon. True False
Viefleur [7K]
True

_____
"quad" is a prefix meaning 4.
"lateral" refers to sides.

"Quadrilateral" means "4-sided".
3 0
3 years ago
Read 2 more answers
What is the total surface area
Stels [109]

We have two right triangles and three different rectangles.

The formula of an area of a right triangle:

A_T=\dfrac{1}{2}l_1l_2

l₁, l₂ - legs

We have l₁ = 20cm and l₂ = 21cm. Substitute:

A_T=\dfrac{1}{2}(20)(21)=(10)(21)=210\ cm^2

The formula of an area of a rectangle:

A_R=lw

l - length

w - width

We have:

rectangle #1: l = 22cm, w = 29cm

A_{R1}=(22)(29)=638\ cm^2

rectangle #2: l = 22cm, w = 21cm

A_{R2}=(22)(21)=462\ cm^2

rectangle #3: l = 22cm, w = 20cm

A_{R3}=(22)(20)=440\ cm^2

The total Surface Area of the triangular prism:

S.A.=2A_T+A_{R1}+A_{R2}+A_{R3}\\\\S.A.=2\cdot210+638+462+440=1960\ cm^2

3 0
3 years ago
Calculate volume of a planet if radius is 6050 and answer in scientific notation
Gre4nikov [31]

Answer:

9.3*10^11

Step-by-step explanation:

4/3πr^3=9.3*10^11

6 0
2 years ago
Tres compañías de navegación pasan por cierto puerto. La primera cada 8 días; la
lilavasa [31]

I think this is a least common multiple question

So they would all arrive on day 504, (which probably is a few years)

8 = 2 × 2 × 2

18 = 2 × 3 × 3

21 = 3 × 7

I might be right I might be wrong, IM not positively sure but yknow

4 0
3 years ago
I need some help i cant figure this out
Luden [163]

Answer:

Um the picture isn´t very clear it is hard to see it.

Step-by-step explanation:

at least on my end it is.

8 0
3 years ago
Other questions:
  • If i make 15 dollars a month and i need 791 dollars how many months will i have to save up for
    12·2 answers
  • Q#1) Simplify each of the following expressions, where possible
    12·1 answer
  • What is (-3)-(-6)×(-9)?
    13·1 answer
  • 2. Lauren is thinking about spending all of her allowance money to buy a new bike. If she has $224
    9·1 answer
  • What is the most specific description of ABCD?
    13·1 answer
  • Find the volume, in cubic inches, of a right rectangular prism with the measurements below.
    12·1 answer
  • I need a complete answer for the entire thing (Please Help) ​
    5·1 answer
  • Surface Area Homework (Help)
    7·1 answer
  • What is the annual interest earned on a $4,000 deposit with a simple interest rate of 3%?
    6·2 answers
  • a taxi charges $2 per mile and $1 per person. If a ride for 2 people costs $12, how many miles was the ride?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!