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Ilya [14]
2 years ago
6

Complementary angles have a sum of 90 degrees true or false​

Mathematics
1 answer:
swat322 years ago
8 0
True would be the answer, sorry if it’s wrong
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Find the measure of an angle such that the difference between the measures of its supplement and four times its complement is 30
Katarina [22]

Answer:

70 degrees

Step-by-step explanation:

x = angle

180 - x = it's supplement

90 - x = it's compliment

(180 - x) - 4(90 - x) = 30

180 - x - 360 + 4x = 30

reducing

3x = 210

x = 70

7 0
2 years ago
St. Augustine grass can grow at the rate of 4 over 7 centimeter per week.
Lady_Fox [76]

Answer:

3 weeks

Step-by-step explanation:

create a proportion of grass growth rate over time:

(\frac{4}{7}÷1) = (\frac{12}{7}÷x )

\frac{4x}{7} = \frac{12}{7}

cross-multiply:

28x = 84

x = 84/28 which is 3

6 0
3 years ago
Read 2 more answers
Show that (A | B) U (B \ A) = (AUB) \(B n A).
trasher [3.6K]

Answer:

We have to prove,

(A \ B) ∪ ( B \ A ) = (A U B) \ (B ∩ A).

Suppose,

x ∈ (A \ B) ∪ ( B \ A ), where x is an arbitrary,

⇒ x ∈ A \ B or x ∈ B \ A

⇒ x ∈ A and x ∉ B or x ∈ B and x ∉ A

⇒  x ∈ A or x ∈ B and x ∉ B and x ∉ A

⇒ x ∈ A ∪ B and x ∉ B ∩ A

⇒ x ∈ ( A ∪ B ) \ ( B ∩ A )

Conversely,

Suppose,

y ∈ ( A ∪ B ) \ ( B ∩ A ), where, y is an arbitrary.

⇒ y ∈ A ∪ B and x ∉ B ∩ A

⇒ y ∈ A or y ∈ B and y ∉ B or y ∉ A

⇒  y ∈ A and y ∉ B or y ∈ B and y ∉ A

⇒  y ∈ A \ B  or  y ∈ B \ A

⇒  y ∈ ( A \ B ) ∪ ( B \ A )

Hence, proved......

7 0
3 years ago
3.5 cm<br> 8.4 cm<br> x cm<br> 5 cm<br> Scale Factor
grigory [225]

Answer:

1.2eStep-by-step explanation:

6 0
2 years ago
What do the following two equation represent
erma4kov [3.2K]

Answer:

D

Step-by-step explanation:

They are clearly not the same line since they don't have the same slope. Because they don't have the same slope, they're not parallel either. In order to be perpendicular, the product of the slopes of both lines must be -1. Since 3/4 * 4/3 ≠ -1, they are not perpendicular, leaving us with option D as the answer.

5 0
3 years ago
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