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zalisa [80]
3 years ago
8

(Look at the image attached!)

Mathematics
1 answer:
Romashka [77]3 years ago
6 0

Answer:

180-80-55

then you got the answer

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According to the scores on the last math test, 80%, or 20. of the students in the class received an A Find the number of student
Kitty [74]

Answer:

25 students

Step-by-step explanation:

.8x = 20

 x = 25 students

4 0
3 years ago
$44 in 4 days or $____ per day
velikii [3]

Answer:

$11/ day

Step-by-step explanation:

$44 /4 days

Divide the top and bottom by 4

44/4 = 11

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5 0
3 years ago
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A car's position is given by s(t) = {3 – 5t? + 7t hundreds of meters with t in minutes.
Nadya [2.5K]

Answer:

A) (1 s, 2.3 s)

B) (-4 m/s², 3.8 m/s²)

Step-by-step explanation:

The car's position which is the distance is given by the equation;

s(t) = t³ - 5t² + 7t

A) Velocity is the first derivative of the distance. Thus;

v(t) = ds/dt = 3t² - 10t + 7

At v = 0, we have;

3t² - 10t + 7 = 0

Using quadratic formula, we have;

t = 1 and t = 2.3

Thus, time at velocity of 0 is t = (1 s, 2.3 s)

B) acceleration is the derivative of the velocity. Thus;

a(t) = dV/dt = 6t - 10

At velocity of 0, we got t = 1 and t = 2.3

Thus;

a(1) = 6(1) - 10 = -4 m/s²

a(2.3) = 6(2.3) - 10 = 3.8 m/s

Thus, a(t) at v = 0 gives; (-4 m/s², 3.8 m/s²)

8 0
3 years ago
What is the solution to 3i-3x + 9i = -18?
shepuryov [24]

Answer:

can you help me for my question please?

Step-by-step explanation:

5 0
3 years ago
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PLEASE HELP ME PLEASE HELP ME WITH MY MATH
ryzh [129]
A. I would estimate that 7 in of the ribbon
B. the estimate would be high because the longer the ribbon is the more of the ribbon would have to be cut.
C. 11.7 - 5.25 = 6.45 iris has to cut 6.45 off the longer ribbon for the ribbons to be the same length.
5 0
3 years ago
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