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
olchik [2.2K]
3 years ago
10

5/7=20/r R=28 Can anyone explain how you get 28

Mathematics
1 answer:
Lesechka [4]3 years ago
8 0

Answer:

Step-by-step explanation:

we are given that these two fractions are equal. however, 20/r is just given in numerators and denominators that are four times as large, even though it is still equal to 5/7. we can tell this because 20 is 4 times larger than 5, which means that R must be 4 times larger than 7, right? YES. so we take 7*4 to get 28.

You might be interested in
7.Suppose that water is entering a cylindrical water tank so that the initial height of the water is 3 cm and the
lukranit [14]

Answer:

H(t) = 3*2^{t/30}

Step-by-step explanation:

Height doubles at every 30 seconds, so let's call n how many times it happens, and the t the total time:

n = t/30

If the height doubles one time, it is multiplied by 2, if it doubles 2 times, it's multiplied by 2², for n times, it is multiplied by 2ⁿ, so for an initial height equal to 3:

H(t) = 3*2^{t/30}

4 0
3 years ago
Need help plsss<br> Question is below
tatuchka [14]

Answer:

Step-by-step ex

its 0.2

5 0
3 years ago
“a railroad bridge spans a gorge 40 feet wide and connects two cliffs at heights of 98 and 158 feet above the bottom of the gorg
VMariaS [17]

Answer:

Height above the bottom gorge is 113 feet

Step-by-step explanation:

The width of the gorge = 40 feet

The height of the higher cliff = 158 feet

The height of the lower cliff = 98 feet

The length of the bridge = √((158-98)² + 40²) = 72.11 feet

The slope of the bridge = (158-98)/40 = 1.5

The length of 1/4 of the bridge from the lower cliff =72.11 - 3/4×72.11 = 18.03 feet

The angle of inclination of the bridge = tan⁻¹(1.5) = 56.31°

The height above the bottom at 3/4 from the higher cliff = The height above the bottom at 1/4 from the lower cliff = 98+ 18.03×sin(56.31 ) = 113 feet

Which can also be found directly from the heights of the two cliffs knowing that 3/4 from the higher cliff = 1/4 from the lower cliff giving;

Height above the bottom gorge = 98 + 1/4×(158 - 98) = 113 feet.

8 0
3 years ago
On the dashboard of Josh's car, there is a clock and an odometer. The odometer tells how many total miles the car has been drive
QveST [7]

Answer:

josh glances at his car's dashboard

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
2 is multiplied by a number.
iragen [17]

Answer:

let anumber be x so

2*x=2x

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Algebra question: Anita rides her bike 82.4 miles each month. Which is the best estimate of the total distance Anita bikes in 6
    8·2 answers
  • Explain how a set of numbers can have a greatest common factor greater than 1
    11·1 answer
  • What is the slope-intercept form of: 4x+6y=2340
    11·2 answers
  • Lisa wants to frame her little brothers drawings is 43.5 cm by 934 mm how many cm of wood framing will she need
    6·2 answers
  • I will mark you brainlist!
    14·1 answer
  • Pl help its for homework
    10·1 answer
  • HELP FAST!!!!
    6·1 answer
  • Mr. Moss had 2 gallons of paint. He painted 3 doors. How many benches can he paint with the paint that is​ left? Show your work.
    8·1 answer
  • Name the transformation in the picture. ​
    7·1 answer
  • If line AB is congruent to line CD then CD is congruent to AB what property
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!