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Lynna [10]
3 years ago
9

Sal paints a wall in his art classroom. He uses 2/3 gallon of blue paint and 1/5 allon of white paint. How much paint does he us

e?
A) 3/8 gallon
B) 1 gallon
C) 7/15 gallon
D) 13/15 gallon
Mathematics
1 answer:
GaryK [48]3 years ago
7 0
2/3 + 1/5 = 4/5 + 1/5 = 1 so B is the answer
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A projectile is fired at time t = 0.0 s, from point 0 at the edge of a cliff, with initial velocity components of V ax= 50m/s an
Kruka [31]

The projectile has constant horizontal speed all the time and we can use this formula

x=Vax*t, where t is time it (projectile) takes to reach x=1000m

t=x/Vax=1000/50=20s

As we know we can split projectile trajectory in two parts and the time for each part is equal. We can conclude that time t=20s belong to first part where projectile is going up.

Formula for this type of movement is  y=Vay-(gt∧2)/2

If we take acceleration of gravity g=10m/s∧2

we get     y=200*20-(10*20∧2)/2=4000-2000=2000m

But if I calculate time it takes the highest point I get  

t=Vay/g=200/10=20s

The highest point for that time is

y= H=Vay∧2/2g=200∧2/2*10=40000/20=2000m

This happened because the projecile is fired from the edge of a cliff which is above the sea line.

Good luck!!!

5 0
3 years ago
What are the solutions of 4x2 - 8x +5 = 0 ?
MrRissso [65]

Answer:

x= {2+ i}/2 , {2- i}/2 = C

Step-by-step explanation:

4x² - 8x +5 = 0

using quadratic formula

x= {-b±√b²-4ac}/2a

x= [-(-8)±√(-8)²-4(4)(5)] /2x4 = [8±√64-80]/8= [8±√-16]/8 = {8±4 i}/8

x= {8+4 i}/8 , {8-4 i}/8

x=4 {2+ i}/8 , {2- i}/8

4 divides 8

x= {2+ i}/2 , {2- i}/2 = c

6 0
3 years ago
Read 2 more answers
What is the answer of 9-s+4s
Julli [10]

Here is an example:

Simplify the expression.

3s+9

5 0
3 years ago
Appreciate if sum one could give me help
m_a_m_a [10]

Answer:

okay so

Step-by-step explanation:

A and B together means straight

C is curved or somthing like curved bc

its not like a circle i would so Horizontical or Vertical

5 0
3 years ago
For an object whose velocity in ft/sec is given by v(t) = −t2 + 2, what is its displacement, in feet, on the interval t = 0 to t
Sedbober [7]

Answer:

1.333

Step-by-step explanation:

Distance travelled (or displacement) will be the antiderivative of Velocity.

Antiderivative of -t^2 + 2 =

d(t) = -t^3/3 +2t

Now plug in t=2 and t=0 and subtract them.

(-8/3+4)- (0/3 +0)= -8/3+4 = 1.333

4 0
3 years ago
Read 2 more answers
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