MATHEMATICS HIGH SCHOOL

A carpenter uses the equation y = 3.75x to determine how many hours (y) it will take him to build a desk (x). The carpenter built 5 desks. How long did it take him?

Answers

Answer 1

Answer: y = 3.75x...he built 5 desks...so x = 5
y = 3.75(5)
y = 18.75 hrs

Answer 2

Answer:

Answer:

18.45

Step-by-step explanation:

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Simplify the expression:
25 - 3(5x - 6) - 22x

Answers

Answer:

yup

Step-by-step explanation:

Dwayne is selling hamburgers and cheeseburgers. He has 100 burger buns. Each hamburger sells for $3, and each cheeseburger sells for $3.50. Which system of inequalities represents the number of hamburgers, h, and the number of cheeseburgers, c, he must sell to have sales of at least $80? h + c ≤ 80 3h + 3.5c ≤ 100 h + c ≤ 80 3h + 3.5c ≥ 100 h + c ≤ 100 3h + 3.5c ≤ 80 h + c ≤ 100 3h + 3.5c ≥ 80

Answers

Given:
hamburger = h ; sells for 3
cheeseburger = c ; sells for 3.50
100 burger buns

h + c = 100

3h + 3.5c > 80 last option.

Answer:

Its D

Step-by-step explanation:

Please help!!Solve the equation and express each solution in a+bi form.
x^4-7x^2-8=0
a. x = -1, 1, 2 sqrt 2, or -2 sqrt 2
b. x = -i, i, 2 sqrt 2, or -2 sqrt 2
c. x = -1, 1, 2 sqrt 2i, or -2 sqrt 2i
d. x = -i, i, 2 sqrt 2i, or -2 sqrt 2i

Answers

Because this is a fourth degree that will be tricky to factor as it is, we will do a u substitution. Let $x^2=u$ . We can now rewrite that polynomial in terms of u: $u^2-7u-8=0$ . Filling into the quadratic formula we have $u=(7+/-√(49-4(1)(-8)))/(2)$ . Simplifying down $u=(7+/-√(81))/(2)$ and $u=(7+9)/(2)$ or $u=(7-9)/(2)$ . That means that u = 8 or u = -1. But don't forget that we let $u=x^2$ , so we have to put x-squared back in for u. That gives us $x^2=8$ which simplifies down to $+/-2√(2)$ . That also gives us $x^2=-1$ . When we take the square root of -1, we have to use the fact that -1 = i^2, so we sub that in to get $x=+/-i$ . All in all, your solutions are as follows: $2√(2),-2√(2),i,-i$ which is choice b.

Solve Mathematics question. Photo

Answers

Take a look at the photo attached.

A laptop has a listed price of 827.95 before tax. If the sales tax rate is 8.75%, find the total cost of the laptop with sales tax included.

Answers

Answer:

$900.40

Step-by-step explanation:

Multiply 827.95 by the sales tax rate of 0.0875 which gets you 72.445625. add 827.95 to this and round, giving you 900.40.

In this triangle, cos A/cos B =?(Write an integer(that is,write a number with no decimal and no decimal places.) IMG_5835.JPG

Answers

cos A = 3/4.24 adj. leg/hypotenuse
cos B = 3/4.24 adj. leg/hypotenuse

cos A/cos B = 1
you are dividing the same number by itself

there is no image attached for us to solve. can you please upload one so we can solve it

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Describe the meaning of the rate. 6 days each month A. Something happens 6 days per month. B. Each month is 6 days long. C. Each day is one month long. D. A day happens six times each month.

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In the triangle shown, what is the value of the missing angle?139°41°65°74°