MATHEMATICS MIDDLE SCHOOL

If s(x) =2-x^2and t(x) =3x which value is equivalent to (s·t)(-7)

Answers

Answer 1

Answer: the answer is 24 (x) -78

Answer 2

Answer:

Answer:

987

Step-by-step explanation:

(s.t)(x) = s(x) × t(x) = 3x(2 - x²) = 6x - 3x³

To evaluate (s.t)(- 7) substitute x = - 7 into the product

(s.t)(- 7) = 6(- 7) - 3(- 7)³ = - 42 + 1029 = 987

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You studied for 14 hours last week. What was your unit rate of hours of study per day?

Answers

The unit rate of hours is 2 per day.

There are 7 days in a week. You studied for 14 hours total. 14/7 is 2. So, 2hr/day.

find the equation in slope-intercept form that descrives a line through (4,-2) with slope -3 A. y = -3x - 2 B. y = -3 x + 4 C. y = -3x + 10 D. y = -3x

Answers

Remember that the slope intercept formula is:

y = mx + b

m is the slope

b is the y-intercept

So far we know the slope and can plug that into the equation like so...

y = -3x + b

Now we must find b

To do that you must plug in the point the line goes through in the x and y of the equation.

(4, -2)

-2 = -3(4) + b

-2 = -12 + b

10 = b

y = -3x + 10

Hope this helped!

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What is 0.505 written as a fraction

Answers

0.505 = 0.505 / 1

Numerator = 0.505 × 10 × 10 × 10 = 505
Denominator = 1 × 10 × 10 × 10 = 1000

Numerator / Denominator = 505 / 1000

The Simplified fraction is

= 505/1000

= 101/200

What is the area of this trapezoid?A) 108 in²
B) 139.5 in²
C) 166 in²
D) 171 in²

Answers

Answer:

B)139.5

Step-by-step explanation:

Right-angled triangle formula A=ab/2 so find the area of both triangles left side: 2*9/2=9 right side 5*9/2= now find the area of the rectangle 9*12= add all them together 9+22.5+108=139.5

the state of Florida has a total area of 58560 square miles, ofnwhich 4308 square miles are covers by water. what equation can you not use to find p, the percent of area of florida that is covered by water?

Answers

p = ( 4308 / 58560) * 100 = 7.35 => p% = 7.35%

p=(4308/58560)*100=7.35=>p%=

Amelia can spend no more than $89 to rent a car for a day trip a rental cost $35 per day plus $.20 per mile right and solve an inequality to find the possible distance in miles M that amelia can drive without exceeding her budget