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
AlekseyPX
3 years ago
15

Pls help me with this equation

Mathematics
1 answer:
miv72 [106K]3 years ago
6 0

Answer:

x = 20

Step-by-step explanation:

Given BD = CD then Δ BCD is isosceles and the 2 base angles are congruent

∠ CBD = ∠ BCD = 40° , then

∠ BDC = 180° - (40 + 40)° = 180° - 80° = 100° ← sum of angles in triangle

Sum the 3 angles of Δ ACD and equate to 180

20 + 100 + x + 40 = 180

160 + x = 180 ( subtract 160 from both sides )

x = 20

You might be interested in
Question 3. Y=(1/5)^xSketch the graph of each of the exponential functions and label three points on each graph.
STatiana [176]

Given exponential function:

y\text{ = (}\frac{1}{5})^x

Let us obtain three points including the y-intercept so that we can plot the function y = f(x)

When x =0:

\begin{gathered} y\text{ = (}\frac{1}{5})^0 \\ =\text{ 1} \end{gathered}

when x =1:

\begin{gathered} y\text{ = (}\frac{1}{5})^1 \\ =\text{ }\frac{1}{5} \end{gathered}

when x =2:

\begin{gathered} y\text{ = (}\frac{1}{5})^2 \\ =\text{ }\frac{1}{25} \end{gathered}

We have the points : (0, 1), (1, 1/5), and (2, 1/25)

Using these points, let us provide a sketch of the plot of y =f(x). We have the plot as shown below:

5 0
1 year ago
What is 2x+3=-7 for property of equality
Tasya [4]

Answer:

-5

Step-by-step explanation:

2x+3=-7

2x=-7-3

2x=-10

x=-10/2

x=-5

3 0
3 years ago
Im confusedd, please help??
spayn [35]

Answer:  three sets of value show 3 consecutive increases and they could be the intensities during fourth, fifth, and six visits:

  • 66%, 69%, 72%;
  • 63%, 65%, 67%, and
  • 67%, 72%, 77%

Explanation:


1) The program recommends a constant intensity for 3 visits, which is what the table shows:

Day        Intensisty

1             63%

2            equal ⇒ 63%

3            equal ⇒ 63%


2) Hence, you have to determine the valid sets that meet the recommendation for the fourth, fifth, and six visits, which are the next three.


2) For the next three visits, the program recommensd increasing intensities.


There are three options that show 3 consecutive increases; they are:

  • 66%, 69%, 72%;
  • 63%, 65%, 67%, and
  • 67%, 72%, 77%

Therefore, those are the choices that apply.

4 0
4 years ago
Help me please!! this is due today​
melisa1 [442]
30 centimeters cubic centimeters
6 0
3 years ago
Barry has 18 more marbles then Heidi. If Barry has 92 marbles, write and solve an equation to determine the number of marbles He
Effectus [21]
92-18=74


Heidi has 74 marbles.

Self Check: 74+18=92
7 0
3 years ago
Read 2 more answers
Other questions:
  • 2x+5=2x-8<br><br><br> a. infinite solutions <br> b. one solution<br> c. no solution
    8·2 answers
  • In triangle A B C, angle C is a right angle and BC = 11. If lower m angle B equals 30 degrees, find AC.
    9·2 answers
  • Which is enough information to prove that line s is parallel to line t
    6·1 answer
  • Evan said the numbers 0.37,0.36,0.25,and 0.4 were in order from greatest to least is he correct
    15·1 answer
  • What is the reference angle of -200
    11·2 answers
  • 10x +9 − x=12<br><br> Solve for X, What does X=?
    6·2 answers
  • Eight less than four times a number
    11·2 answers
  • Complete the ratio table.
    9·1 answer
  • -100x - 100 = 0<br>-100x = ?<br> x = ?​
    9·2 answers
  • 6.55743... is an irrational number because it is an
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!