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
sergiy2304 [10]
3 years ago
10

Line segment ABCD is split into unequal segments by points A, B, C, and D. The length of segment AD is 28 cm, and the distance b

etween the midpoints of segments AB and CD is 16 cm. Find the length of segment BC.
Mathematics
1 answer:
Oksana_A [137]3 years ago
5 0

Answer:

4 cm

Step-by-step explanation:

The midpoint segment has length ...

... L = AB/2 + BC + CD/2 = 16 cm

The entire segment has length ...

... AD = AB + BC + CD = 28 cm

If we subtract AD from 2L, we have ...

... 2L - AD - 2L = 2(AB/2 +BC + CD/2) - (AB +BC +CD) = 2(16 cm) -28 cm = 4 cm

... AB +2BC + CD -AB -BC -CD = 4 cm . . . . remove parentheses

... BC = 4 cm . . . . simplify

You might be interested in
The function V= √1.223w expresses the landing speed, V (in feet per second), as a function of gross weight, w (in pounds), of an
mylen [45]
<span>an equation that expresses the gross weight of an aircraft as a function of its landing speed will be given as follows:
</span><span> V= √1.223w
we make w the subject of the equation, we start by dividing both squaring both sides:
</span>V²=(√1.223w)²
V²=1.223w
next we divide both sides by 1.223 to get :
V²/1.223=1.223w/1.223
w=V²/1.223
hence the answer will be w=V²/1.223
3 0
3 years ago
Read 2 more answers
Solve for x. The triangles in each pair are similar.
pishuonlain [190]
Start off by knowing that the two triangle are congruent. By knowing this you can turn the given numbers into fractions.

9/72 = 7/7x+7

then cross multiply, which equals

63x + 63 = 504

then solve this equation

63x = 441 - subtract 63 from both sides
x = 7 - divide by 63 from both sides

so your answer is x=7
6 0
3 years ago
Use a graph in a (-2π, 2π, π/2) by (-3, 3, 1) viewing rectangle to complete the identity.
yaroslaw [1]

First, notice that:

2\tan (\frac{x}{2})=2\cdot(\pm\sqrt[]{\frac{1-cosx}{1+\cos x})}

And in the denominator we have:

1+\tan ^2(\frac{x}{2})=1+\frac{1-\cos x}{1+\cos x}=\frac{1+cosx+1-\cos x}{1+cosx}=\frac{2}{1+\cos x}

then, we have on the original expression:

\begin{gathered} \frac{2\tan(\frac{x}{2})}{1+\tan^2(\frac{x}{2})}=\frac{2\cdot\pm\sqrt[]{\frac{1-\cos x}{1+cosx}}}{\frac{2}{1+\cos x}}=\frac{2\cdot(\pm\sqrt[]{1-cosx})\cdot(1+\cos x)}{2\cdot(\sqrt[]{1+cosx})} \\ =(\sqrt[]{1-\cos x})\cdot(\sqrt[]{1+\cos x})=\sqrt[]{(1-\cos x)(1+\cos x)} \\ =\sqrt[]{1-\cos^2x}=\sqrt[]{\sin^2x}=\sin x \end{gathered}

therefore, the identity equals to sinx

8 0
1 year ago
Please hurry it’s timed
frutty [35]

Answer:

I believe it is Option 1

Step-by-step explanation:

Since the fourth root of 81 will be 3 and of 16 will be 2.

4 0
3 years ago
Find the volume of the prism at right all angles are right angles.....
dexar [7]
Lets divide this prism into two parts. The bottom part has dimensions of 15mm length x 5mm width x 7mm height.

The bottom is 15x5x7 = 525 cubic mm.

The top part has dimensions of 9mm length (I got this by subtracting the 3mm on each side that the top is shorter than the bottom.. 15-3x2) x 5mm width x 3mm height.

The top is 9x5x3 = 135 cubic mm.

Added together ... 525 + 135 = 660 cubic mm = the total area of the prism.

Hope this helps
8 0
3 years ago
Read 2 more answers
Other questions:
  • A ramp is 10 feet in length. The ramp is lifted 4 feet off the ground to the truck door. What is the distance across the
    11·2 answers
  • The sum of two consecutive integers is 57.
    14·2 answers
  • Select three ratios that are equivalent to 8 : 5
    6·2 answers
  • Find the slope of the line graphed below.
    8·1 answer
  • 20 POINTS!!! NEED IT FAST. A vehicle travels on a highway at a rate of 65 mi/h. How long does it take the vehicle to travel 25 m
    5·1 answer
  • Simplify. (3x^5z)^5<br> a. 243x25z5<br> b. 243x25z5<br> c. 81x25z5<br> d. 15x25z5
    8·1 answer
  • 3h-2(4h-5)=10-5h A-0 B-4 C-infinity many solutions D-no solutions​
    12·1 answer
  • Can someone help please?
    8·2 answers
  • A car is driven 600 miles and uses 20 gallons of gas. If gas is $1.05 per gallon, what is the gasoline cost per mile?
    6·1 answer
  • 4+2(8²×4²)+6+4+6+6+6+2+2​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!