Answer:
a) £10.50
b) £5.40
Step-by-step explanation:
In this context, "of" means "times".
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<h3>a)</h3>
1/4 × £42 = £(42/4) = £10.50
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<h3>b)</h3>
2/5 × £13.50 = £(2·13.50/5) = £(27/5) = £5.40
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<em>Additional comment</em>
The symbol "£" is a currency symbol identifying the units of the associated number. For algebraic purposes, any symbol representing units can be treated as though it were a variable.
Answer:
20 + 2 =22 or in words it would be twenty two
Step-by-step explanation:
Answer:
A system of linear equations usually has a single solution, but sometimes it can have no ... A system of linear equations has one solution when the graphs intersect at a point. ... one. If you find a root and your discriminant is <0 (which means the quadratic really ... P.S. you can't use the discriminant to check linear equations.
Step-by-step explanation:
Step-by-step explanation:
Q6
answer A, as x² is the regular parabolic curve up. and x²-3 just shifts this curve down by 3 units. and that is what we need, as the extreme point of the curve is a bit below the x-axis, and therefore has a negative y value.
Q7
answer C, as this curve is the complete opposite of the curve in Q6.
it is the regular parabolic curve but down. that means -x².
but the extreme point is a bit above the x-axis (and has therefore a positive y value). -x²+3 shifts the parabolic curve up by 3 units.
Q8
answer A again. the functional values are only positive (the whole curve is above the x-axis). so, C and D are therefore wrong.
and between A and B we need to remember, that a negative exponent means 1/...
in case of B 1/(2^x).
and that would mean for large positive x we would get very small values for y.
but we see the opposite. for large x we also get large y.
so, it is 2^x (answer A).