Henry made 30 cookies for the bake sale. He ate 1/3 of them as they came out of the oven. He then had to bake 20 more cookies. At the sale, he sold 1/2 of them. How many cookies are left?

20 cookies left

Step-by-step explanation:

Henry had 30 cookies but ate 1/3 of them as they came out.

He now has (30 * 1/3 = 30/3 = 10) 30-10 = 20 cookies left

He makes 20 more cookies.

He now has 20 + 20 = 40 cookies.

He sold half of them. He now has (40* 1/2 = 40/2 = 20) 40 - 20 = 20 cookies left.

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%

the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

the root or roots of a polynomial are the values of the variable that makes the polynomial equal to 0. we can find the roots of a polynomial making the expression equal to 0 and then, isolating the variable (it it has just one variable).

for example, given the following polynomial:

the root or zero of the polynomial, can be found by making the expression equal to 0, and then, isolating the variable, so, finding the root we have:

therefore, we have that the root of the polynomial is equal to 2.

we must remember that the number of roots that a polynomial can have, will depend on the degree of the polynomial, a first degree polynomial have will have one single root, a second degree polynomial (quadratic expression) may have two roots and so.

hence the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

have a nice day!