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Delicious77 [7]
2 years ago
11

Select the correct answer. Which equation represents the measure of the unknown angles?

Mathematics
1 answer:
Arisa [49]2 years ago
7 0
C. x+x+10
Angles in a triangle add up to 180-50=130
130-10=120/2=x
x(60)+x(60)+10=130
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in 2 h, kelly laid new floor tile over 1/5 of the room. when she was joined by annette, the rest of the work was completed in 3h
jeyben [28]

Answer: Annette will take 6 hours to do the entire job alone.

Step-by-step explanation:

Given: Time taken by Kelly to do \dfrac{1}{5} of job = 2 hours

i.e. Time for complete job done alone by Kelly =5\times2=10\ hours

Rest of work = 1-\dfrac{1}{5}=\dfrac{4}{5} of the job

\dfrac{4}{5}  of the complete job done by both Kelly and Annette in 3 hours

Time would be taken by then to do entire job together = 3\times\dfrac{5}{4}=3.75\ hours

Let t be the time taken by Annette to do job alone.

Then, as per situation

\dfrac{1}{3.75}=\dfrac{1}{10}+\dfrac{1}{t}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{1}{3.75}-\dfrac{1}{10}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{4}{15}-\dfrac{1}{10}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{1}{6}\\\\\Rightarrow\ t=6

hence, Annette will take 6 hours to do the entire job alone.

7 0
4 years ago
The width of a rectangle is the length minus 3 units.The area of the rectangle is 10 units. What is the width, in units, of the
labwork [276]

Answer:

2 units

Step-by-step explanation:

It's because the only whole number factor pair to 10 is 2x5 and luckily, it turned out that 5-3=2, so there are no decimals or fractions.

5 0
3 years ago
Use the commutative property of multiplication to identify which expression is equivalent to 6(2)(x).
11Alexandr11 [23.1K]
The commutative property is when you change the order but not the answer. To better understand what they are asking you, let's let x=1- 6 * 2 * 1=12; Answer A wouldn't be right because there are no 6,2, or x's. Remember you just change the ORDER not the GROUPING so Answer B is wrong too. Now Answer C and Answer D are left. Now you just need to look at the signs. 6(2) just means 6 TIMES 2 so pick the option with multiplication. So your answer is C. Hope I helped!
5 0
4 years ago
If you could help I would really appreciate it, but if not that’s fine. Thank you.
tigry1 [53]
Since 6 is greater than 5 you input it into the last equation!

2•(6^2) -7
2•(36) -7
72 -7
65

The answer is 65!
5 0
3 years ago
How can properties of linear pairs and vertical angles help determine the angle measures created by the intersecting lines?
fiasKO [112]

Answer:

Linear pairs are adjacent angles that are supplementary. Their measures add to 180 deg. Vertical angles are congruent. Let's say two lines intersect, and you know the measure of one of the 4 angles that were formed.

Step-by-step explanation:

3 0
3 years ago
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