Mathematics, 23.04.2020 01:33 jaylaga47

SOMEONE HELP ASAP PLEASE I NEED HELP

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15 + 6t = 81
The number, t, is 11.
——————————-
40 + 55h = 190
She works for 2.7 hours.
——————————-
1.75 + .75m = 4.75
The trip is 3 miles.

Answer from: chaparro0512

Question #1: t = unknown number

15 + 6t = 81

[The sum(addition) of 15 and 6 times(multiplication) a number t is(=) 81.

So 15 plus 6t(6 times t) equals 81.]

To find t, isolate/get the variable "t" by itself in the equation:

15 + 6t = 81 Subtract 15 on both sides

15 - 15 + 6t = 81 - 15

6t = 66 Divide 6 on both sides to get "t" by itself

t = 11 The number(t) is 11

Question #2: h = the number of hours

55h + 40 = 190

[The electrician charges $40 plus $55 per hour(h) that she works, and the total charge is(=) $190]

To find h, isolate/get the variable "h" by itself in the equation:

55h + 40 = 190 Subtract 40 on both sides

55h = 150 Divide 55 on both sides to get "h" by itself

h = $\frac{150}{55}$ Simplify the fraction

$h=\frac{30}{11}$ The electrician works 30/11 hours (or 2.7272727272....repeating forever)

Question #3: m = the number of miles traveled

0.75m + 1.75 = 4.75

[The taxi charges $40 plus $0.75 per mile(m), and the total charge is(=) $4.75]

To find m, isolate the variable:

0.75m + 1.75 = 4.75 Subtract 1.75 on both sides

0.75m = 3 Divide 0.75 on both sides to get "m" by itself

m = 4 The trip is 4 miles.

Answer from: Quest

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.

Answer from: Quest

Ithink the answer is d.

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