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Simplify and solve the following equation: x^2 -8x +15=0

Simplify the equation first by putting the x^2 into brackets. I do this by finding two values that both multiply to get 15 and add to get -8. I can see that -3 and -5 fit this criteria, but i could eas...

Answered by Amira B. • Maths tutor

4159 Views

Sophia (mass 47Kg) is travelling to the right with a velocity of 7.2m/s and Neesha (mass 68Kg) is travelling to the left with a velocity 4.8m/s. When they meet, they hold hands and travel off together. Give their final velocity and direction

We know that p=mv,

So Sophia travels at 7.2 m/s and she has a mass of 47kg so her p is: p=7.2 x 47=338.4 kgm/s

Neesha travels with a velocity of -4.8 m/s and...

Answered by Raquel L. • Physics tutor

3833 Views

There are "n" sweets in a bag, six are orange and the rest are yellow. If you take a random sweet from the bag and eat it. Then take at random another one and eat it. The probability of eating two orange sweets is 1/3. Show that n²-n-90=0.

We have:

n= total of sweets

6= orange sweets

(6-n)=yellow sweets (We use 6-n beacuse we know that if 6 sweets are orange, the rest must be yellow, so yellow sw...

Answered by Raquel L. • Maths tutor

5062 Views

When do I use the auxiliary verb "essere" and when "avere" in compound tenses?

When building a compound tense it is necessary to use the auxiliar "essere" when the verb is a reflexive verb, and/or when the verb is intransitive ( it cannot take a direct object). It is in...

Answered by Alice B. • Italian tutor

2078 Views

How is abnormality defined?

Abnormality is a fluid concept that can mean different things to different people in different cultures and society. However, this subjective term can be operationalised by the DSM. This categories abn...

Answered by Perah M. • Psychology tutor

1931 Views