Answer:
its -6
hopefully this will help you
(8 – 3r) 6
Need help simplify this expression
A ball is thrown from the top row of seats in a stadium. The function
ℎ()=−162+64+80
gives the height, in feet, of the ball t seconds after it is thrown. How long will it be before the ball hits the ground
Answer:
It will be 5 seconds before the ball hits the ground
Step-by-step explanation:
∵ A ball is thrown from the top row of seats in a stadium
∵ The function
∵ h(t) = −16t² + 64t + 80 , gives the height, in feet, of the ball t seconds
after it is thrown
∵ The ball hits the ground
→ That means h(t) = 0
∵ h(t) = 0
∴ 0 = -16t² + 64t + 80
→ Reverse the two sides
∴ -16t² + 64t + 80 = 0
→ Divide both sides by -16 to simplify it
∵ [tex]\frac{-16t^{2}}{-16}+\frac{64t}{-16}+\frac{80}{-16}=\frac{0}{-16}[/tex]
∴ t² - 4t - 5 = 0
→ Factorize it into two factors
∵ t² = t × t
∵ -5 = -5 × 1
∵ -5t + 1t = -4t ⇒ the middle term
→ The factors are (t - 5) and (t + 1)
∴ (t - 5)(t + 1) = 0
→ Equate each factor by 0 to find t
∵ t - 5 = 0
→ Add 5 to both sides
∴ t = 5
∵ t + 1 = 0
→ Subtract 1 from both sides
∴ t = -1 ⇒ rejected because no negative value for the time
∵ t = 5
∴ It will be 5 seconds before the ball hits the ground
PLEASE HELP ME WITH THIS MATH PROBLEM FOR 26 POINTS AND BRAINLIEST AND EXTRA POINTS IF YOU GET THE BRAINLIEST FIRST!!!!! THIS IS VERY URGENT!!
Answer:
The answer is C [ the third choice]
Step-by-step explanation:
Answer: I'm not sure what the answer is so I'd either choose :
C.) n > 6/7 or
D.) n > - 6/7
What does “m” stand for in the slope formula?
A. y axis
B. y coordinated
C. slope
D x coordinated
4(-2)(5)
What is the answer?
Answer:
-40
Step-by-step explanation:
Answer:
-40
-2 x 5=-10
You have the 4 and you need to multiply it by -10
-10 x 4 =-40
If b = 3, then b ^-2 is equivalent to ... please help fast lol I’m in a test
Answer:1/9
Step-by-step explanation:
The density of sugar is 1.6 g/cm3. What is the mass of a sugar cube
with a volume of 5.0 cm3?
Answer:
8.0 g
Step-by-step explanation:
you have a ratio of 1.6g : 1 cm^3.
x : 5.0?
1.6 * 5.0 = 8
If this is chemistry, you have 2 sig figs. Therefore your answer is 8.0 g
Car Y travels 105 miles on 3 gallons of petrol. Car Z travels 80 miles on 9 litres of petrol.
Which car has better petrol consumption ( more miles per gallon)?
You may use the fact that 1 gallon =4.5 litres
Options are
A. None
B. Y
C. Z
Answer:
Car Z has better petrol consumption. Choice C. Z
Step-by-step explanation:
Petrol Consumption
Car Y travels 105 miles on 3 gallons of petrol. The average consumption is 105 / 3 = 35 miles/gallon
Car Z travels 80 miles on 9 litres of petrol. Since 1 gallon=4.5 litres, the consumption of car Z is 9/4.5= 2 gallons. The average consumption is 80/2 = 40 miles/gallon.
This means that car Z has better petrol consumption. Choice C. Z
What is the image of (1,8) after a dilation by a scale factor of 4 centered at the origin?
Answer:
(5,40)
Step-by-step explanation:
Answer:
Step-by-step explanation:
-1,8
If e || f and a || b, what is the value of y. *
Answer:
y = 90
Step-by-step explanation:
Since, e || f and a || b
Therefore, quadrilateral so formed is a rectangle.
Each angle of a rectangle is right angle.
[tex] \therefore \: y \degree = 90 \degree \\ \\ \huge \red{ \boxed{ \therefore \: y = 90}} \\ \\ [/tex]
Easy 7th grade work sheet ! Please help , I’ll give brainliest (all answers)
There are 75 ounces of chips in the extra-large bag. A serving size is 4 ounces. How many servings are in the chip bag?
Answer:
18
Step-by-step explanation:
75 divided by 4 is 18.75
so there are 18 servings
Solve for x
(x+3)^2
x^2 + 3x + 2
2x^2 + 3x + 2
x^2 + 6x + 2
x^2 + 6x + 9
x^4+6x^3+35x^2+18x+9
All I can figure out sorry
MULTIPLE CHOICE QUESTION
ink
!!!
In order to scale up a ratio, we must...
multiply both numbers by 2
divide both numbers by 2
divide both numbers by the same amount
multiply each number by the same
amount
le
What the answer
Answer:
divide both number by the same amount
what does 3½-1⅞ equal???
In a small library , there are 5 nonfiction books for every 9 fiction books There are 130 a . How many fiction books are there ?
Answer: 234
Step-by-step explanation:
If there are 130 nonfiction books, then there are 234 fiction books
IF yall report 1 more time istg
Whats 2/3 x 1/5
Answer:
2/15
Step-by-step explanation:
2/3*1/5=2/15
Answer:
0.133
Step-by-step explanation:
Can someone please please help me?
Answer:
Step-by-step explanation:
2,23
4,24
6,25, etc
Determine the type of symmetry presented in the figure
Make a conjecture about the sum of primes based on the following pattern:
4 = 2 + 2
6 = 3 + 3
8 = 3 + 5
10 = 3 + 7
12 = 5 + 7
and so on.
The sum of primes is equal to an even number.
The sum of primes is equal to the multiple of the primes.
The sum of primes is equal to primes.
The sum of primes is between 4 and 12.
Answer:
the answer is "the sum of primes is equal to an even number"
Step-by-step explanation:
The sum of primes is equal to an even number. Then option A is correct.
What is a prime number?Any natural number higher than 1 that is not the sum of two smaller natural numbers is referred to be a prime number.
Prime numbers = { 1 , 2 , 3 , 4 , 5 ..............}
The given pattern is,
4 = 2 + 2
6 = 3 + 3
8 = 3 + 5
10 = 3 + 7
12 = 5 + 7
In the given pattern we can see that the sum of all the prime numbers is an even number.
Hence, option A is correct.
To know more about prime numbers follow
https://brainly.com/question/145452
#SPJ2
Given f(x) = -2x - 1, solve for x when f(x) = -7
What is the equation of the line that passes through (4, -1) and (-2, 3)?
Answer:
y= - 4/6x+1.66
Step-by-step explanation:
To get the slope you subtract y2-y1 / x2-x1. This gives the slope. Then you need to get the y-intercept. This can be done by substituting the slope and the coordinates of a point (x, y) on the line in the slope-intercept formula and then solve for b.
Read the problem to choose the correct method, then solve. A farmer buys a tractor for $50,000. If the tractor depreciates 10% per year, use an exponential function to find the value of the tractor in 7 years. AD CO Exponential Growth, $97,435.86 Exponential Decay, $23,914.85 Exponential Growth, $315,000 Exponential Decay, 21,523.36
Answer:
The correct option is, Exponential Decay, $23,914.85.
Step-by-step explanation:
A farmer buys a tractor for $50,000.
It is provided that the the tractor depreciates 10% per year.
The exponential function for decay is:
[tex]y=a\cdot (1-r\%)^{t}[/tex]
Here,
a = initial value
r = decay rate
t = time
Compute the value of the tractor in 7 years as follows:
[tex]y=a\cdot (1-r\%)^{t}[/tex]
[tex]=50000\times (1-0.10)^{7}\\\\=50000\times 0.4782969\\\\=23914.845\\\\\approx 23914.85[/tex]
Thus, the correct option is, Exponential Decay, $23,914.85.
PLEASE HELP!!! QUICK!!!
Answer:
A B and D
Step-by-step explanation:
the number just has to be below 1/1
one angle of an isosceles triangle measure 140 degrees. which other angles could be in that isosceles triangle?
Answer:
20!
Step-by-step explanation:
Isosceles triangles have 2 angles are the same. Since we can't do 140, because interior angles of a triangle equal 180, then we need to subtract 140 from 180. 180-140=40. 40/2 because of 2 angles=20. 20 is the angle.
Answer:
20
Step-by-step explanation:
2(6)-8=10-5
how would 2(6)-8 equal 10-5?!
Answer:
It would not
Step-by-step explanation:
10-5 is basically 2-1 so if 2x6-8 (or 2(6)-8) equals 2-1 then it would. So you start with multiplying 6 and 2 and get 12. 12-8 equals to 4-3. I didn't find your answer but I did what I could.
Two times the difference of 13
and a number is -4. Write an
equation representing this
situation and solve for the
number.
Answer:
Step-by-step explanation:
let number be x
CASE 1) when x>13
2(x-13) = 4
2x - 26 = 4
2x = 30
x = 15
CASE 2) when x<13
2(13 - x) = 4
26 - 2x = 4
26 - 4 = 2x
22 = 2x
11 = x
Craig bought 4.5 pounds of ground beef for $29.25. What is the unit price of the ground beef?
Answer:
the answer would be 6.50
Step-by-step explanation:
unit price is the price for 1 pound in this example, to find it you have to divide 29.25 by 4.5 which would give you 6.50, hope this helps!
jina runs 4 miles in 30 minutes. at the same rate, how many miles would she run in 48 minutes
Answer:
6.4
Step-by-step explanation:
You want to divide 30 by 4 to figure out the rate.
30 / 4 = 7.5
Now you divide again, taking the 48 into the equation.
48 / 7.5 = 6.4
Jina would run 6.4 miles in 48 minutes, following the same rate.
Match each statement with the right choice.
6 ( 5 + 8)
5 (10 + 3)
9 ( 2 + 4)
7 ( 3 + 6)
Answer:
Your answer is:
1) 6 ( 5 + 8 ) = 78
2) 5 ( 10 + 3 ) = 65
3) 9 ( 2 + 4 ) = 54
4) 7 ( 3 + 6 ) = 63
Step-by-step explanation:
Hope this helped : )
