Nick is now seven times as old as Harry. In 6 years, Nick will be five times as old as Harry. How old will Harry be i

Mathematics

1 answer:

Svetllana [295]3 years ago

6 0

Answer:

Step-by-step explanation:

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What is the value of 1/3 x^2 + 5.2y when x = 3 and y = 2? PLZ HELP!!!

olasank [31]

The first step in solving this is to substitute x with 3 and y with 2, so that
$\frac{1}{3} x^{2} +5.2y$
becomes
$\frac{1}{3} (3)^{2} +5.2(2)$
Then simply solve using the order of operations.
First exponents (there are no parentheses)
$\frac{1}{3} 9 +5.2(2)$
Then multiply and divide
$3+10.4$
And finally add and subtract
$13.4$
Therefore the value of 1/3 x^2 + 5.2y when x=3 and y=2 is 13.4

6 0

3 years ago

If 0 < b ≤ 90 and cos(11b + 2) = sin(12b − 4), what is the value of b?

Elza [17]

Answer:

b = 4

Step-by-step explanation:

The given expression is

Cos (11b + 2) = Sin (12b - 4)

Since, Sin(θ) = Cos(90 - θ)

Therefore, Cos (11b + 2) = Cos [90 - (12b - 4)]

Where 0 < b ≤ 90°