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melisa1 [442]
3 years ago
11

-2+3y=7 2x -5y=-3 Pleaseeeeeeer help

Mathematics
1 answer:
Alja [10]3 years ago
8 0

I want to ask something

do you mean

-2x+3y=7 or just 12+3y=7

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Find the value of the unknown number in the proportion 17/80=p/100
rjkz [21]
17/80 = p/100

p = 17/80 * 100

p = 0.2125 * 100

p = 21.25
8 0
3 years ago
The Niagara Falls ferris wheel has a diameter of 48 meters, and one revolution takes 2.25 minutes to complete. Riders can see Ni
Yanka [14]

The time intervals when the riders could see Niagara falls are; 0.834 < t < 1.416 and (3.084, 3.666)

<h3>How to interpret Cycle Graphs?</h3>

From the diagram attached, we can say that;

Period = 2π/k

where;

k = 2π/2.25

k = 8π/9

Thus;

h(t) = -(48/2) cos (8π/9)t + ((48/2) + 0.5)

h(t) = -24cos (8π/9)t + 24.5

Riders can see Niagara falls if they are higher than 41 meters above the ground. Thus;

41 = -24cos (8π/9)t + 24.5

41 - 24.5 = -24cos (8π/9)t

16.5 = -24cos (8π/9)t

-0.6875 = cos (8π/9)t

cos⁻¹0.6875 = (8π/9)t

t = 0.834 min

Thus, time interval is between;

0.834 < t < (2.25 - 0.834)

⇒ 0.834 < t < 1.416 and

(2.25 + 0.834) < t < (2.25 + 1.416)

⇒ (3.084, 3.666)

Read more about Cycle Graphs at; brainly.com/question/24461724

#SPJ1

4 0
2 years ago
Factor completely: x^2-y^2-1.5(x-y)
guapka [62]

Answer: x^2 - y ^2 − 1.5x + 1.5y

Step-by-step explanation:

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3 years ago
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What is the domain of f(x)=9-x²<br> A(.fx)≥9<br> B.All real numbers<br> C.-3≤x≤3<br> D. x≤9
Ber [7]

Answer:

B. all real numbers

Step-by-step explanation:

hope that helps

3 0
3 years ago
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Evaluate the expression 3 * 5 x when x is 2.
Ivahew [28]

Answer:

3 * 5x

3 * 5(2)

3 * 10

30

5 0
3 years ago
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