MATHEMATICS HIGH SCHOOL

17.The speed limit of a highway is 55 miles per hour. A car is traveling at least 65 miles per hour. How many miles per hour m over the speed limit is the car traveling?55 – m ≥ 65; m ≥ 10 m + 65 ≤ 55; m ≤–10 65 – m ≤ 55; m ≤ 10 55 + m ≥ 65; m ≥ 10** 18. Chris earns $7.00 per hour working on the weekends. He needs at least $210.00 for a new cell phone. How many hours, h, does Chris need to work on the weekends to buy a new phone?
h/7.00 > 210.00; h> 30; 30 hours h/7.00 < 210.00; h < 30; 30 hours 7.00h≥ 210.00; h≥ 30; 30 hours 7.00h≤ 210.00; h ≤ 30; 30 hours

Answers

Answer 1

Answer:

Answer:

17.) D.) 55 + m ≥ 65; m ≥ 10

18.) C.) 7.00h≥ 210.00; h≥ 30; 30 hours

Explanation:

I took the test, also your answers were right.

Answer 2

Answer: 17. 55 + m ≥ 55

18. 210 / 7 = 30 h

h ≥ 30 hours

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Find the values of x and y in the following system of two equations.7x - 3y = -16
4x + 6y = 2

Answers

Answer:

x = -5/3 and y = 13/9

Step-by-step explanation:

Which of the following equations represent the Pythagorean theorem?A. c =
$\sqrt{ {a}^(2) } + {b}^(2)$
B. m =
$(y2 - y1)/(x2 - x1)$
C. c= a+b
D. ab=ba

Answers

There's no equation represent the pythagorean theorem in the options. The option A is closed to pythagorean theorem, except the b² should be under root.

Pythagorean Theorem is supposed to be like this
$c= \sqrt{a^(2)+b^(2)}$

Is (6, -4) a solution for the following system of equations? y=8-2x
x+3y=12

Yes or No?

Answers

Answer: no

Step-by-step explanation: explained in photo

What is the value of this expression?

(9^2+79)/2^2

(its a fraction)

Answers

Hey there!

$Answer: \boxed{40}$

$Explanation:$

Simplify to solve.

$\boxed{40}\text{ is your answer.}$

Hope this helps!

$\text{-TestedHyperr}$

Answer:

Step-by-step explanation:

(9^2 +79) /2^2

(81 +79) /4

160/4

I'm tryna find the sum

Answers

Answer:

9x + 4

Step-by-step explanation:

Combine like terms which are 5x and 4x and 6 and -2

(03.06)A school system is reducing the amount of dumpster loads of trash removed each week. In week 5, there were 60 dumpster loads of waste removed. In week 10, there were 40 dumpster loads removed. Assume that the reduction in the amount of waste each week is linear. Write an equation in function form to show the amount of trash removed each week.

f(x) = −4x + 60
f(x) = 4x + 60
f(x) = −4x + 80
f(x) = 4x + 80

Answers

Given:
Week 5 = 60 dumpster load
Week 10 = 40 dumpster load

60 - 40 = 20
5 - 10 = 5

20/5 = 4 dumpster load per week.

Week 0 to Week 5 = 20 ⇒ 20+60 = 80

f(x) = -4(x) + 80
f(5) = -4(5) + 80
f(5) = -20 + 80
f(5) = 60

f(10) = -4(10) + 80
f(10) = -40 + 80
f(10) = 40

Answer:

Step-by-step explanation:

I dont have proof but I promise you its right. :)

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Write the expression in factored form

Sin43×cos47+cos47×sin43

Which expressions are equivalent to 16x4 − 64? Check all that apply. 16x4 + 16x – 16x – 64 16x4 – 8x – 8x – 64 (4x2 + 8)(4x2 – 8) 16(x2 + 2)(x2 – 2) 4(4x4 – 8)