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3 years ago

Quarter past 7 , what time is it ?

Mathematics

2 answers:

enot [183]3 years ago

4 0

Given statement is "Quarter past 7".

Using this statement we have to find equivalent time.

We know that word "quarter" means one fouth (1/4) of the complete cycle.

Biggest unit of time in watch is hour so we will take quarter that is one fourth of 1 hour.

There are 60 minutes in an hour.

so one fouth of 60 minutes will be 60/4 or 15 minutes.

Hence "Quarter past 7" basically means 15 minutes more than 7 hours.

So equivalent time can be written as 7:15 or just 7 hours and 15 minutes.

Phoenix [80]3 years ago

3 0

A quarter of an hour is 15 minutes, so a quarter past 7 is 7+15 mins. This gives you:

7:15

Hope this helps and good luck!

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What is the slope of this graph?

guapka [62]

Answer: 1/5 up 1 over 5

Step-by-step explanation:

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3 years ago

A ball is kicked in the air. The height of the ball can be calculated using the equation h(t) =-16t^2+64t+190, where h is in hei

gregori [183]

Answer:

Therefore the ball strikes the ground 5.98 s after kick.

Step-by-step explanation:

Given that , a ball is kicked in the air. The height of the ball can be calculated using the equation $h(t)=-16t^2+64t+190$ where h is height in feet and t is time in second.

When the ball touches the ground then the height will be zero.

i.e h(t)=0

Therefore

$-16t^2+64t+190=0$

$\Rightarrow -2(8t^2-32t-95)=0$

Since -2≠0 then $(8t^2-32t-95)=0$

$(8t^2-32t-95)=0$

[The solution of a quadratic equation ax²+bx+c=0 is

$x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$ here a=8, b=-32 and c=-95]

$\Rightarrow t =\frac{-(-32)\pm\sqrt{(-32)^2-[4\times8\times(-95)]} }{2\times8}$

$\Rightarrow t =\frac{32\pm\sqrt{4064} }{16}$

Therefore t= 5.98 or -1.98

since time can not be negative So , t=5.98 s

Therefore the ball strikes the ground 5.98 s after kick.

5 0

3 years ago

(36 - 4)(6+2)<br> Standard form

jolli1 [7]

The answer is 256 ,

explanation- 6+2 is 8 and 36-4 is 32. 8 times 32= 256

3 0

3 years ago

Answer this question please and thank you

larisa86 [58]

Answer:

eight by eight is equals to sixty four

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3 years ago

Help me on 1,2,3,5,and 6 please

arlik [135]

Since most of these are mixed number you have to convert them into improper fractions.
For an example 2 3/4 x 1/2
First you would have the convert 2 3/4
You would add 2 to 3 then multiply 2 to 4
So it would be (2x4) + 3
You keep the denominator of the originally fraction so it would be 11/4
Then to finish you would multiply straight across so
11x1= 11
4x2=8
11/8
1 3/8
Hope this helps!!

8 0

3 years ago