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iris [78.8K]
3 years ago
13

Help me please I’m having trouble with these equations

Mathematics
1 answer:
melamori03 [73]3 years ago
6 0

Answer:

-292

Step-by-step explanation:

because i said so. if im correct- please give me brainliest because im poor

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PLEASE HELP!!!! I’m about to rip my hair out over this.
Nina [5.8K]

Step-by-step explanation:

1. The equation graph is a parabola, so the maximum height will be the vertex of the parabola. You can find the vertex coordinate t using the formula:

t = -b/2a

t = -18/2•(-4.9)

t = -18/-9.8

t = 1.84 seconds

2. The height of the ground is 0, so the balls hit the ground when the equation result is 0:

0 = -4.9t²+18t+10

Now you solve it using Bhaskara:

Δ = b² -4ac

Δ = 18² -4•(-4.9)•10

Δ = 520

t = (-b ±√Δ)/2a

t = (-18 ± √520)/2•(-4.9)

t1 = (-18 - 20.8)/-9.8

t1 = 3.96 seconds

t2 = (-18 +20.8)/-9.8

t2 = -0.28

Doesn't exist negative time, so we pick the first value found, t = 3.96 seconds

3. Now you just need to put 3 in place of t to find the result:

h = -4.9•3² +18•3 +10

h = -4.9•9 + 54 + 10

h = -44.1 + 64

h = 19.9 meters

4. You just need to put 1 in place of t to find the height:

h = -4.9•1²+12

h = -4.9+12

h = 7.1 meters

5 0
3 years ago
Write the equation of this line in point-slope form using the point (1,-3) .
Nookie1986 [14]

Answer:

c. y + 3 = (1/2)(x - 1)

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Help please. If correct I’ll mark as brainliest but I rlly need help.
kykrilka [37]

Answer:

46

Step-by-step explanation:

x +3x+5x - 54 = 360

x +3x+5x = 360 + 54

9x = 414

x= 46

4 0
3 years ago
The total cost f(x), in dollars, for renting a vacation house for x days is shown:
MA_775_DIABLO [31]

Answer:

Option D.The number of dollars it costs to rent the house for 10 days

Step-by-step explanation:

we have

f(x) -----> the total cost for renting a vacation house

x ------> the number of days rented

we know that

f(x)=10+250x

so

For x=10 days

substitute in the function

f(10)=10+250(10)=$2,510

f(10) represent the number of dollars it costs to rent the house for 10 days

3 0
3 years ago
Read 2 more answers
So the people who are good at math Im going to ask 17 questions that invlove math so if u want 20 points in each question then g
PilotLPTM [1.2K]

Answer: ok will do

Step by step explanation

3 0
2 years ago
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