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Factorise and solve x^2 - 8x + 15 = 0

Step 1: Factorise. In the final factorised form, your answer would be written in the form (x+a)(x+b). When expanded, this becomes: x^2 + (a+b)x + ab

HS
Answered by Hanan S. Maths tutor
2889 Views

Sue has 2 cats. Each cat eats 1 4 of a tin of cat food each day. Sue buys 8 tins of cat food. Has Sue bought enough cat food to feed her 2 cats for 14 days? You must show how you get your answer.

Initially we must work out the rate at which the tin food is consumed by 2 cats, so we multiply 1/4 (tin food per day for 1 cat) by 2(number of cats), which equals 2/4, so both cats consu...

GK
Answered by Grisilda K. Maths tutor
15721 Views

Solve for x and y using simultaneous equations: 3x+y=10 x+y=4

3x+y=10 _x+y=4-------------2x=6x=3x+y=43+y=4y=1

CL
Answered by Charlieanne L. Maths tutor
2308 Views

When do you use the subjunctive form?

The subjunctive (le subjonctif) is a mood that is used to express: desire, uncertainty, probability, and other subjective feelings about a situation. It is formed by regular and i...

IR
Answered by Isabella R. French tutor
1317 Views

Two trains are heading in opposite directions on the same track. Train X has a mass of 16000kg and a speed of 2.8m/s. Train Y has a mass of 12000kg and a speed of 3.1m/s. At what speed do the joined trains move off together immediately after the collison?

Remembering that if the velocities are in different directions they have different signs:Total momentum before=Total momentum afterMomentum=mass x velocityTotal momentum before= (16000x2.8)+(12000x(-3.1))...

CJ
Answered by Carys J. Physics tutor
1328 Views

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