Which of the sets of ordered pairs represents a function? (1 point) A = {(2, 7), (1, −5), (7, 2), (2, −9)} B = {(5, 3), (−2, −9)
Neporo4naja [7]
Answer:
its B
Step-by-step explanation:
i was taught to do functions by lining up the xs on one side and the ys on the other(if they repeat only put the number once) then draw lines to the pairs. no x value can have two y values.
So, the formula is C=5/9(F-32)
You would substitute the 50C for C:
50 = 5/9 (F - 32)
Divide both sides by 5/9 (or multiply by the reciprocal)
90 = F - 32
Add the 32 to both sides:
122 = F
So, 50C = 122F
Step-by-step explanation:
First, we should define supplementary angles.
Supplementary angles are angles that add up to 180 degrees.
Since 1 and 2 are supplementary and we know their values, we just set them equal to 180 degrees
(
4
y
+
7
)
+
(
9
y
+
4
)
=
180
Now just solve for one variable
13
y
+
11
=
180
13
y
=
169
y
=
13
Now the question asks for m<2, which is
9
y
+
4
So we just plug in
9
⋅
13
+
4
=
121
So m<2 is 121
Answer:
y = 30
Step-by-step explanation:
Use the direct variation equation, y = kx
Plug in 20 as y and 8 as x, then solve for k:
y = kx
20 = k(8)
2.5 = k
So, the equation is y = 2.5x
Plug in 12 as x, and solve for y:
y = 2.5x
y = 2.5(12)
y = 30
So, when x = 12, y = 30
Answer:
Proved that DF = FE.
Step-by-step explanation:
See the given diagram attached.
In triangle Δ DEF, we have to prove DF = FE when ∠ 3 = ∠ 4.
The proof is like followings :
1. ∠3 = ∠4, Reason: Given
2. ∠1 and ∠3. Reason: They are supplementary.
∠2 and ∠4. Reason: They are supplementary.
3. ∠1 = ∠2. Reasons: Two Angles Supplementary to Equal Angles are Equal to Each Other.
4. DF = EF. Reason: Opposite sides of equal angles. (Answer)
