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
Zolol [24]
3 years ago
13

A quadrilateral has three angles that measure 90o , 100o, and 120o. Which is the measure of the fourth angle?

Mathematics
1 answer:
Reptile [31]3 years ago
3 0

360 - (100 + 90 + 120)  \\ 360 - 310 = 50
it measures 50


good luck
You might be interested in
Part A: Describe how you can decompose this shape into triangles. (2 points)
kvv77 [185]

Answer:

A: 6 triangles with height 10.4 inches each and base 12 inche

B: 62.4 square inches

C: 374.4 square inches

Step-by-step explanation:

Part A: You can form a triangle by connecting E to the top of the segment and connecting the top of the segment to D. Recreating this with each section will create 6 triangles with height 10.4 inches each and base 12 inches.

Part B: The area of a triangle is A = 1/2b*h. Substitute h = 10.4 and b = 12.

A = 1/2*10.4*12 = 62.4

Part C: There are 6 triangles each with area 62.4. So the area of the whole figure will be 6*62.4 = 374.4.

8 0
3 years ago
A school replaced 20% of it computers with new ones . what the total number of computers in the school if 55 computers were repl
sladkih [1.3K]
The total is 275 because 100% divided by 20% is 5 and if 20%= 55 then that means that 55 goes into 100% 5 times so you multiply 55 by 5 to get 275. Hope I helped! Please rate me as the brainliest!
7 0
3 years ago
Pleasee help.If anyone know 12th grade math...Please help any kind hearted ones out there​
Sidana [21]

Answer:

m>7 = 142°

Step-by-step explanation:

m>6 = 38°

180° - 38° = 142°

m>7 = 142°

3 0
2 years ago
What is the surface area of this figure?
Mkey [24]

Answer:

100

Step-by-step explanation:

hope this helped

stay safe

brainliest is appreciated only 1more to level up please help :)))

8 0
3 years ago
(1/1+sintheta)=sec^2theta-secthetatantheta pls help me verify this
Xelga [282]

Answer:

See Below.

Step-by-step explanation:

We want to verify the equation:

\displaystyle \frac{1}{1+\sin\theta} = \sec^2\theta - \sec\theta \tan\theta

To start, we can multiply the fraction by (1 - sin(θ)). This yields:

\displaystyle \frac{1}{1+\sin\theta}\left(\frac{1-\sin\theta}{1-\sin\theta}\right) = \sec^2\theta - \sec\theta \tan\theta

Simplify. The denominator uses the difference of two squares pattern:

\displaystyle \frac{1-\sin\theta}{\underbrace{1-\sin^2\theta}_{(a+b)(a-b)=a^2-b^2}} = \sec^2\theta - \sec\theta \tan\theta

Recall that sin²(θ) + cos²(θ) = 1. Hence, cos²(θ) = 1 - sin²(θ). Substitute:

\displaystyle \displaystyle \frac{1-\sin\theta}{\cos^2\theta} = \sec^2\theta - \sec\theta \tan\theta

Split into two separate fractions:

\displaystyle \frac{1}{\cos^2\theta} -\frac{\sin\theta}{\cos^2\theta} = \sec^2\theta - \sec\theta\tan\theta

Rewrite the two fractions:

\displaystyle \left(\frac{1}{\cos\theta}\right)^2-\frac{\sin\theta}{\cos\theta}\cdot \frac{1}{\cos\theta}=\sec^2\theta - \sec\theta \tan\theta

By definition, 1 / cos(θ) = sec(θ) and sin(θ)/cos(θ) = tan(θ). Hence:

\displaystyle \sec^2\theta - \sec\theta\tan\theta \stackrel{\checkmark}{=}  \sec^2\theta - \sec\theta\tan\theta

Hence verified.

8 0
3 years ago
Other questions:
  • I need help and the answer to #9
    9·1 answer
  • T^3-9t^2+15t use the equation to find t
    13·1 answer
  • Eli has 8 black pens and 5 in his desk drawer. He also has 3 yellow highlighters, 4 green highlighters, and 5 pink highlighters
    6·1 answer
  • 5х + 3 = 43<br> What this??
    7·2 answers
  • What is the simplified form of the quantity 9 x squared minus 25 over the quantity 3 x plus 5?
    6·2 answers
  • Is the answer indefinite, zero, or infinite?<br> 3x - 2 + 2x - 3
    5·2 answers
  • What number can be a common denominator for 3/4 and 1/8
    7·2 answers
  • Katrina stacked 2 blocks on top of each other. The height of the first block
    6·1 answer
  • Find equation of the line that contains the point (4,-2) and is perpendicular to the line y= _2x+8
    6·2 answers
  • Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!