To find the average of these 4 numbers add them together then divide by 4:

\( \frac{15 + 13 + 18 + 10}{4} \) = \( \frac{56}{4} \) = 14

If a single cook can bake 4 large cakes per hour and the kitchen is available for 4 hours, a single cook can bake 4 x 4 = 16 large cakes during that time. 33 large cakes are needed for the party so \( \frac{33}{16} \) = 2\(\frac{1}{16}\) cooks are needed to bake the required number of large cakes.

If a single cook can bake 10 small cakes per hour and the kitchen is available for 4 hours, a single cook can bake 10 x 4 = 40 small cakes during that time. 490 small cakes are needed for the party so \( \frac{490}{40} \) = 12\(\frac{1}{4}\) cooks are needed to bake the required number of small cakes.

Because you can't employ a fractional cook, round the number of cooks needed for each type of cake up to the next whole number resulting in 3 + 13 = 16 cooks.

The equation for this sequence is:

a_n = a_n-1 + 7

where n is the term's order in the sequence, a_n is the value of the term, and a_n-1 is the value of the term before a_n. This makes the next number:

a₆ = a₅ + 7
a₆ = 29 + 7
a₆ = 36

An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.

Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):

2 + (5 + 2) ÷ 3 x 3 - 5²
P: 2 + (7) ÷ 3 x 3 - 5²
E: 2 + 7 ÷ 3 x 3 - 25
MD: 2 + \( \frac{7}{3} \) x 3 - 25
MD: 2 + \( \frac{21}{3} \) - 25
AS: \( \frac{6}{3} \) + \( \frac{21}{3} \) - 25
AS: \( \frac{27}{3} \) - 25
AS: \( \frac{27 - 75}{3} \)
\( \frac{-48}{3} \)
-16