MATHEMATICS HIGH SCHOOL

Find the difference: 28y − 16y. Select one of the options below as your answer:.A. 12y. B. 10y. C. -44y. D. -12y

Answers

Answer 1

Answer: 28y - 16y = 12y
answer is A. 12y

Answer 2

Answer:

Answer: 12y

Step-by-step explanation:

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The average of the weights of six people sitting in a boar is 145 pounds. After a seventh person gets into the boat, the average of the weights of all seven people in the boat is 147 pounds. What is the weights ( in pounds ) of the seventh person ?a) 160, b) 159, c) 155, d) 149, e) 147

Answers

Weight :

⇒ x for 6 people
⇒ y for the 7th person

$x/6=145 \n (x+y)/6=147 \n \n x=145*6 \n x=870 \n \n x+y=1029 \n \n 870+y=1029 \n y=1029-870 \n y=159$

The correct answer is B).

x - weight of six people
y - weight of 7th person

$(x)/(6)=145\n (x+y)/(7)=147\n\n x=870\n x+y=1029\n\n 870+y=1029\n y=159\ lb\Rightarrow B$

The area of a sector of the circle with an arc measure of 45 degree and with a radius of 4 is?

Answers

π * 4^2 * 45 / 360 = 16π / 8 = 2π.

Select the expression that is equivalent to the polynomial given below. (4x + 3)(3x - 8)

a.) 12x2 - 23x - 24
b.) 12x2 + 41x + 24
c.) 12x2 - 23x + 24
d.) 12x2 - 41x - 24

which would be the best option?

Answers

Answer:

The correct option is c.

Step-by-step explanation:

The given expression is

$(4x+3)(3x-8)$

Using distributive property we get

$4x(3x-8)+3(3x-8)$

Again use distributive property.

$4x(3x)+4x(-8)+3(3x)+3(-8)$

$12x^2-32x+9x-24$

Combine like terms.

$12x^2-23x-24$

Therefore the correct option is c.

Answer:

Step-by-step explanation:

Widget Wonders produces widgets. They have found that the cost, c(x), of making x widgets is a quadratic function in terms of x. The company also discovered that it costs $16 to produce 2 widgets, $18 to produce 4 widgets, and $48 to produce 10 widgets. Find the total cost of producing 8 widgets. Write your answer in quadratic equation.