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3 years ago

7 1/2 divided by 3/4 ? = 5 = 4 = 7 = 10

Mathematics

1 answer:

kati45 [8]3 years ago

8 0

Answer:

Step-by-step explanation:

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What should you know about the slopes of perpendicular lines? SOMEONE HELP ME

Goryan [66]

Let's use an example

Say we had two lines P and Q. If P has slope 2/5, then Q must have slope -5/2 in order for P and Q to be perpendicular.

Note how -5/2 is the negative reciprocal of 2/5. In other words, you flip the fraction and the sign to go from either slope.

Another thing to notice is that the two slopes multiply to -1. This is true for any pair of perpendicular lines as long as neither line is vertical.

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4 years ago

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Pls help me on B asap

Zanzabum

Take the common denominator and divide by 3 then youll get 58

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3 years ago

During the national day celebrations.Asha decorates her balcony with serial lights of red,green and white colours.The red light

expeople1 [14]

If all three coloured lights blink together at 8:49 pm, they will blink together at 8:50 pm

<u>Solution:</u>

Given that the red light blinks at intervals of 4 seconds, the green at 5 seconds and the white at 6 seconds.

If all three colored lights blink together at 8:49 pm,

We have to find when will they blink together again?

First let us know, at what intervals they all together blink.

For that we have to find the lcm of 4, 5, 6.

L.C.M (4, 5, 6) = 2 x L.C.M(2, 5, 3)

As 2,3,5 are primes, we can’t take common further, so multiply all

= 2 x 2 x 5 x 3

= 4 x 15 = 60

So, after every 60 seconds = 1 minute they will blink.

Then, after 8 : 49 pm, they will blink at 8 : 49 + 1 = 8 : 50 pm.

Hence, they all blink at 8 : 50 pm.

6 0

3 years ago

WILL GIVE BRAINLIEST!!<br> Simplify.<br> (-8^3)^2

motikmotik

Answer:

Step-by-step explanation:

When you have an number with an exponent raised to an exponent, multiply the two exponents.

3*2=6

so the answer is (-8)^6

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3 years ago

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According to a college survey, 55% of all students work full time. Find the standard deviation for the number of students who wo

e-lub [12.9K]

Answer:

The standard deviation for the number of students who work full time = 8.38

Step-by-step explanation:

Given data

Sample size n = 284

No. of students work full time is P = 55 % = 0.55

No. of students who not work full time is Q = 100- 55 % = 45 % = 0.45

The standard deviation is given by

$S.D. = \sqrt{nPQ}$

Put all the values in above equation we get

$S.D. = \sqrt{(284)(0.55)(0.45)}$

S.D. = 8.38

This is the standard deviation for the number of students who work full time.

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3 years ago