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Ulleksa [173]
3 years ago
5

Whats 2(-1)2 +4(-1)-1=

Mathematics
1 answer:
Vinvika [58]3 years ago
8 0

Answer:

-5

Step-by-step explanation:

Distribute first: -2 + 2 - 4 -1 = -5

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An object is thrown upward from the top of a 192 ft building with an initial velocity of 64 feet
Airida [17]

Answer:

t=6

Step-by-step explanation:

ground height = 0

(are you sure your formula is correct? isn't it - 16t²?)

if h=16t² +64t+192 is true then

16t² +64t+192 = 0

t² + 4t + 12 = 0

t = (-4 ± √(4² - 4*12)) / 2*1 = (-4 ± √-32) / 2 = -2 ± 2√-2

There is no solution of t

if it is h= - 16t² +64t+192

0 =- 16t² + 64t + 192

t² - 4t - 12 = 0

(t + 2) (t -6) = 0

t should be positive

t = 6 sec

7 0
3 years ago
Is 4y=x a direct variation
worty [1.4K]
The direct variation equation is y =kx

Lets see:-

4y/4 = x/4
y = 1/4x

<span>Answer: Yes, this is a direct variation </span>
6 0
3 years ago
Read 2 more answers
Oil spill spreads 25 m² every 1/6 hour how much area does the oil spill cover after two hours
Delvig [45]
1/6 of an hour is 10 minutes because there are 60 minutes in an hour so 60/6=10
so it's 25m^2/10minutes
now just multiply 25 by 12 ( 12 lots of 10 minutes in 2 hours)
25*12=300
answer is 300m^2

hope this helped
6 0
3 years ago
Read 2 more answers
X^2-7x+1=0<br> using quadratic formula
bezimeni [28]
This is the answer in exact form

4 0
3 years ago
How do I find the measurements of this triangle
Rudik [331]
Using sine law: 

9/sinc = 15/sin22 

sinc = 9sin22 / 15 = 0.225 

so c = sin^-1(0.225) = 12.99 degrees ~~ 13 degrees

if B was required:

B = 180  - C - A ~~  145 

8 0
3 years ago
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