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
riadik2000 [5.3K]
3 years ago
10

I need help with geometry

Mathematics
2 answers:
Soloha48 [4]3 years ago
4 0

Answer:

It 12

Step-by-step explanation:

This is because the scale factor between the triangles is 1.75, so I divide 21 by 1.75 and got 12

Hope this helped

Sergio [31]3 years ago
3 0

We first have to find 2 pairs of sides that proportional.

35/20=42/24=7/4

and 21/b should be 7/4 as well because if we want the triangles to be similar the sides should be in proportion.

21/b=7/4

84=7b

b=12

Done!

Hope this helped, any questions about this just ask in the comments and I will answer.

You might be interested in
May I please get the answers to the first 4 of these problems?
Ugo [173]
Given:
A(3,0)
B(1,-2)
C(3,-5)
D(7,-1)

1) reflect across x=-4
essentially calculate the difference between the x=-4 line and Px and "add" it in the other direction to x=-4
A(-4-(3-(-4)),0)=A(-11,0)
B(-4-(1-(-4)),-2)=B(-9,-2)
C(-4-(3-(-4),-5))=C(11,-5)
D(-4-(7-(-4)),-1)=D(-15,-1)

2) translate (x,y)->(x-6,y+8)
A(-3,8)
B(-5,6)
C(-3,3)
D(1,7)

3) clockwise 90° rotation around (0,0), flip the x&y coordinates and then decide the signs they should have based on the quadrant they should be in
A(0,-3)
B(-2,-1)
C(-5,-3)
D(-1,-7)

D) Dilation at (0,0) with scale 2/3, essentially multiply all coordinates with the scale, the simple case of dilation, because the center point is at the origin (0,0)
A((2/3)*3,(2/3)*0)=A(2,0)
B((2/3)*1,(2/3)*-2)=B(2/3,-4/3)
C((2/3)*3,(2/3)*-5)=C(2,-10/3)
D((2/3)*7,(2/3)*-1)=D(14/3,-2/3)
7 0
3 years ago
Carol had 9/12 of a container of milk for the french toast she was cooking. She poured 2/3 of the container into the pan. How mu
Effectus [21]

Answer:

1/12 of the container of milk will be left in the container

Step-by-step explanation:

To solve the question, we first note the variables

Volume of milk available = 9/12 of a container

Volume of milk poured in a pan = 2/3 of a container

Quantity of milk left = Initial quantity of milk less the quantity poured out

That is 9/12-2/3 = 1/12 of the container of milk

This means that there will be only 1/12 of the container of milk left

4 0
3 years ago
below is a graph of a logarithmic function, identify it key characteristics. match accordingly.that is the question and can you
Zolol [24]

End behavior: f. As x -> 2, f(x) -> ∞; As x -> ∞, f(x) -> -∞

x-intercept: a. (3, 0)

Range: p. (-∞, ∞)

The range is the set of all possible y-values

Asymptote: x = 2

Transformation: l. right 2

with respect to the next parent function:

g(x)=\log _{\frac{1}{3}}(x)

Domain: g. x > 2

The domain is the set of all possible x-values

4 0
1 year ago
Analysis of an accident scene indicates a car was traveling at a velocity of 69.5 mph (31.1 m/s) along the positive x-axis at th
STatiana [176]

We can find the acceleration via

{v_f}^2-{v_i}^2=2a\Delta x

We have

\left(5.20\dfrac{\rm m}{\rm s}\right)^2-\left(31.1\dfrac{\rm m}{\rm s}\right)^2=2a(115\,\mathrm m)

\implies\boxed{a=-4.09\dfrac{\rm m}{\mathrm s^2}}

Then by definition of average acceleration,

a_{\rm ave}=\dfrac{v_f-v_i}t

so that

-4.09\dfrac{\rm m}{\mathrm s^2}=\dfrac{5.20\frac{\rm m}{\rm s}-31.1\frac{\rm m}{\rm s}}t

\implies\boxed{t=6.33\,\mathrm s}

We alternatively could have found the time without knowing the acceleration. Since acceleration is constant, the average velocity is

v_{\rm ave}=\dfrac{x_f-x_i}t=\dfrac{v_f+v_i}2

Then

\dfrac{115\,\rm m}t=\dfrac{5.20\frac{\rm m}{\rm s}+31.1\frac{\rm m}{\rm s}}2

\implies\boxed{t=6.33\,\mathrm s}

7 0
3 years ago
Right triangles are similar. Always Sometimes Never
zavuch27 [327]

Answer:

Always

Step-by-step explanation:

Right triangles are always similar.

All right triangles have a 90 degree angle.

This means that, they would all look visually similar because of the 90 degree angle.

4 0
3 years ago
Read 2 more answers
Other questions:
  • A slushy machine fills 25 containers that hold 64 oz of liquid in a day. how many quarts is this?
    15·2 answers
  • Gregory’s taxable income last year was $65,750. According to the tax table below, how much tax does he have to pay if he files w
    8·2 answers
  • Please help on b (left of c) and c !!!
    6·2 answers
  • Evaluate y5 for y = 1.<br> 1<br> 5<br> 15
    13·1 answer
  • A GP has 8 terms, it's first and last terms are 0.3 and 38.4/, calculate the common ratio
    7·1 answer
  • (-3)s-4=29 what does s equal?
    7·1 answer
  • Find the equation of a line parallel to −4x−5y=−4 that contains the point (3,−2). Write the equation in slope-intercept form.
    6·1 answer
  • Please help me thanks sooo much
    15·1 answer
  • A researcher is concerned that graduate students get less than the recommended 8 hours of sleep a night. She selects a random sa
    14·1 answer
  • Find the price of one pen if six pens cost$48.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!