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
OLga [1]
3 years ago
9

Triangles ABC and PQR are similar. What is the length of PQ?

Mathematics
1 answer:
Alenkasestr [34]3 years ago
6 0

Answer:

PQ=10.5

Step-by-step explanation:

From thales' similarity theorem:

PQ/AB=PR/AC=QR/BC

PQ/7=18/12

PQ=7×18/12=7×3/2=21/2=10.5

You might be interested in
Which equation represents the line that passes through the points (-3, 7) and (9,-1)? oy--3x+5 o y=-x-7 o y=zx-7 oy - 12 2x+5​
nekit [7.7K]

Answer:

use the slope equation (y2-y1) / (x2 -x1). plug in values and solve

(-1 -7) / (9 -(-3)) (subtracting a negative is the same as adding a positive)

-8 / 12 (simplify)

m = -2/3

then, plug in one of the points and the slope into the slope-point equation.

(y - y1) = m (x - x1) (the point-slope form)

y - 7 = -2/3( x - (-3)) (plug in the slope and point 1 values, then solve)

y - 7 = -2/3x - 2 (add 7 to both sides)

y = 2/3x +5 (the answer)

Step-by-step explanation:

I hope this helps :))

4 0
3 years ago
Which of the following is equal to the rational expression when x=-1 or -7? (x+1)(x-1)/(x+7)(x+1) a. x+7/x-1 b. x-1/x+7 c. x+1/x
e-lub [12.9K]

Answer:b

Step-by-step explanation:

(×+1)(×-1)

---------------

(×+1)(×+7)

=cancel (×+1) both the numerator and denominator then you are left with

(×-1)

-------

(×+7)

=(×-1)/(×+7)

5 0
4 years ago
Which of the following is a which of the following is a rational number?
Nastasia [14]

Answer:

A. √25

General Formulas and Concepts:

<u>Math</u>

  • Rational Numbers - numbers that can be written as integers, terminating decimals, or fractions
  • Irrational Numbers - numbers that have non-terminating decimals i.e infinite decimals and cannot be written into a fraction

Step-by-step explanation:

<u>Step 1: Define</u>

A. √25

B. √123

C. √20

D. π

<u>Step 2: Identify</u>

A. √25 = 5; Rational

B. √123 ≈ 11.0905...; Irrational

C. √20 = 2√5 ≈ 4.47214...; Irrational

D. π ≈ 3.1415926535897932384626433832795...; Irrational

Therefore, our answer choice is A.

5 0
3 years ago
√50 inrrational or rational
goldfiish [28.3K]

Answer:

it is irrational

Step-by-step explanation:

hav a nice dAY

7 0
3 years ago
HELP !!!!!!!!!!!!!!!!
Fantom [35]

Answer:

∠2 = 51°

Step-by-step explanation:

The sum of supplementary angles = 180°

Equate the sum of the angles to 180 and solve for a

11a + 19 + 6a - 9 = 180

17a + 10 = 180 ( subtract 10 from both sides )

17a = 170 ( divide both sides by 17 )

a = 10

Hence

∠2 = (6 × 10) - 9 = 60 - 9 = 51°

5 0
4 years ago
Other questions:
  • What is the range of y=csc(x)
    14·2 answers
  • 248 is equal to 65 added to w
    15·2 answers
  • Which two abiotic factors (also known as climate) determine the types of plants and animals that will be found in each terrestri
    6·2 answers
  • Gradient answer it for bare points
    8·1 answer
  • Given f(x)=(x+5)(x-2), what are the x-intercepts?
    15·1 answer
  • Someone help me with this algebra question please 100% correct only
    14·2 answers
  • How many edges does a polyhedron with 28 faces and 40 vertices have calculator?
    8·2 answers
  • Write the ratio of 14 and 18 in its lowest terms
    11·2 answers
  • Please help I have no one to explain this to me​
    11·1 answer
  • Please help mee <br><br> help help
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!