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Nataly_w [17]
3 years ago
9

you are working on a project for school. the project will take 12 hours to finish in all. so far, you have worked on the project

for 5 hours and 15 minutes. how much longer you have to finish?
Mathematics
1 answer:
nasty-shy [4]3 years ago
7 0

Answer:

6 hours and 45 minutes

Step-by-step explanation:

First, convert 12 hours into minutes.

12*60=720

Convert 5 hours to minutes and add 15

5*60=300+15=315

Subtract 720 from 315.

720-315=405

Convert into hours and minutes.

405/60=6.75

0.75 of an hour is 45 minutes so the answer is 6 hours and 45 minutes.

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morpeh [17]
4-2/3x=x-6/5

Answer: X=6
7 0
3 years ago
If 2x- 3 + 3x = 28 what is the value of x
andreev551 [17]

Answer:

x= 31/5  (Exact form)

x= 6.2  (Decimal Form)

x= 6 1/5 (Mixed number form)

Step-by-step explanation:

6 0
3 years ago
You are given the parametric equations x=2cos(θ),y=sin(2θ). (a) List all of the points (x,y) where the tangent line is horizonta
vladimir1956 [14]

Answer:

The solutions listed from the smallest to the greatest are:

x:  -\sqrt{2}   -\sqrt{2}  \sqrt{2}  \sqrt{2}

y:      -1         1     -1     1

Step-by-step explanation:

The slope of the tangent line at a point of the curve is:

m = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }

m = -\frac{\cos 2\theta}{\sin \theta}

The tangent line is horizontal when m = 0. Then:

\cos 2\theta = 0

2\theta = \cos^{-1}0

\theta = \frac{1}{2}\cdot \cos^{-1} 0

\theta = \frac{1}{2}\cdot \left(\frac{\pi}{2}+i\cdot \pi \right), for all i \in \mathbb{N}_{O}

\theta = \frac{\pi}{4} + i\cdot \frac{\pi}{2}, for all i \in \mathbb{N}_{O}

The first four solutions are:

x:   \sqrt{2}   -\sqrt{2}  -\sqrt{2}  \sqrt{2}

y:     1        -1        1     -1

The solutions listed from the smallest to the greatest are:

x:  -\sqrt{2}   -\sqrt{2}  \sqrt{2}  \sqrt{2}

y:      -1         1     -1     1

6 0
3 years ago
The exterior angle of a regular polygon is 15 degrees how many sides does it have
Komok [63]
The formula to use is
n = 360/E
where 
n = number of sides
E = measure of exterior angle

In our case, E = 15 so 
n = 360/E
n = 360/15
n = 24

This regular polygon has 24 sides
6 0
3 years ago
Helppppp I have until 11:30 and it’s 10:36
forsale [732]

Answer:

911

Step-by-step explanation:

Now you can get help

7 0
3 years ago
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