Is DE DF ? Explain
D
58
161
A.
Yes; ZF = 61, so DE is congruent to DF by the Isosceles Triangle Theorem.
B.
Yes; mZF =61, so DE is congruent to DF by the Converse of the isosceles Triangle Theorem.
O
C. No; the measure of ZF is not given, so it is not known whether A DEF is isosceles or not. Thus no pair of sides in A DEF can be
proven congruent.
O D. No; although A DEF is isosceles, it is not known whether ZF is congruent to ZE or LD, so it is not known which pair of sides in
ADEF are congruent.

answer: i'm great at algebra

~coco

step-by-step explanation:

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).

4+3x hope you like mark as brainliest✔

shell's the art director at her local community center. she paid $10 and for each child that attends she earns $4.

for each child she ears $4 that is the slope m = 4

she paid $10, that is the initial amount paid. so 10 is the y intercept b

m =4   and b = 10

y intercept is 10 so the point is (0,10)

we start graph from y intercept (0,10)

slope = 4 . we know slope = rise / run

slope = 4   or 4/1   are same

rise = 4   and run = 1

for rise we move 4 units up and for run we move 1 unit to the right

the graph is attached below

x axis is the number of child she attends

y axis is the amount   she earns