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
Brilliant_brown [7]
3 years ago
12

Help please !!!!!!!!!!!!!!

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
5 0
1) The triangles are similar, so correponding sides have the same ratio.
.. 3x/20 = (4x +2)/28
.. 3x/5 = (4x +2)/7 . . . . . . . multiply by 4
.. 7*3x = 5(4x +2) . . . . . . . multiply by 35 = 5*7
.. 21x = 20x +10 . . . . . . . . eliminate parentheses
.. x = 10 . . . . . . . . . . . . . . . subtract 20x


2) The triangles are similar, so corresponding measures have the same ratio.
.. x/42 = 10/15
.. x = 42*(10/15) = 28


3) The third angle of triangle ABC is 180° -20° -80° = 80°. Then two of the angles of ABC match those of JKL. The 3rd answer selection is appropriate.
You might be interested in
For what value(s) of k will the relation not be a function
skelet666 [1.2K]

We are given two relations

(a)

Relation (R)

R=[((k-8.3+2.4k),-5),(-\frac{3}{4}k,4)]

We know that

any relation can not be function when their inputs are same

so, we can set both x-values equal

and then we can solve for k

k-8.3+2.4k=-\frac{3}{4} k

3.4k-8.3=-\frac{3}{4}k

3.4k\cdot \:10-8.3\cdot \:10=-\frac{3}{4}k\cdot \:10

4k-83=-\frac{15}{2}k

34k=-\frac{15}{2}k+83

\frac{83}{2}k=83

83k=166

k=2............Answer

(b)

S = {(2−|k+1| , 4), (−6, 7)}

We know that

any relation can not be function when their inputs are same

so, we can set both x-values equal

and then we can solve for k

2-|k+1|=-6

2-\left|k+1\right|-2=-6-2

-\left|k+1\right|=-8

\left|k+1\right|=8

Since, this is absolute function

so, we can break it into two parts

|f\left(k\right)|=a\quad \Rightarrow \:f\left(k\right)=-a\quad \mathrm{or}\quad \:f\left(k\right)=a

k+1=-8\quad \quad \mathrm{or}\quad \:\quad \:k+1=8

we get

k+1=-8\quad

k=-9

k+1=8\quad

k=7

so,

k=-9\quad \mathrm{or}\quad \:k=7...............Answer

5 0
3 years ago
Please help me out :))))))
Ugo [173]

Answer:

83 degree because it is 180-97

7 0
3 years ago
Which table shows data with variability?
masya89 [10]

Answer:

the table should show the data

3 0
3 years ago
Read 2 more answers
What is the meaning of the point with an x coordinate of 3?
snow_tiger [21]
The answer is D. Since the x line is seconds and y is feet traveled it would mean that the train travels 180 feet in 3 seconds
4 0
2 years ago
Read 2 more answers
Which expression is equivalent to (-1/3)(6x + 15) -3 *
Vedmedyk [2.9K]
-2x + 12 is the answer .
4 0
3 years ago
Other questions:
  • Leon needs to save more than $350 to buy a new bike. He has$130 saved so far, and he plans to save $20 each week until he has en
    12·2 answers
  • Solve for x.<br><br><br><br> 5x−2(x+1)=14 ​
    7·2 answers
  • A machine makes 300 boxes in 15 minutes. Which expression equals the unit rate in boxes per minute
    6·2 answers
  • Evaluate for a = 2<br><br> 5a + 6 = _____
    8·2 answers
  • Cathie is making a dress with a sash. The sash needs to be 72.1 inches long, but Cathie's measuring tape is only in centimeters.
    15·1 answer
  • The base of a right prism is a right triangle. The lengths of the legs of the right triangle are 4 centimeters and 8 centimeters
    6·2 answers
  • Convert 2,000 cm to kilometers.<br> * fraction form *
    11·1 answer
  • Find the length of CD
    13·2 answers
  • Pls help asap<br> ………………
    9·1 answer
  • Y=2x+40 and y=4x+20 when will these be equal
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!