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IrinaK [193]
3 years ago
13

CALCULATE 5/8 + 3 1/4 x -3/6 - 2 5/12

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
8 0
CALCULATE 5/8 + 3 1/4 x -3/6 - 2 5/12 = -3 5/12
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Pls help me on this
FinnZ [79.3K]

Answer:500

Step-by-step explanation:So first u mutiply by 100 then divide by 90

8 0
2 years ago
Divide the sum of 8/7 and-3/14 by their difference
valina [46]

Sum:

8/7+(-3/14)=13/14

difference:

8/7-(-3/14)=19/14

As per given condition we have,

sum/difference=(13/14)/(19/14)=13/19

5 0
3 years ago
A toy rocket is launched from a platform that is 48 ft high. The rocket height above the ground is modeled by h=-16t^2+32t+48. a
Komok [63]

Answer:

a) 64 feet

b)  3 seconds

Step-by-step explanation:

a)

The maximum height of h=h(t) can be bound by finding the y-coordinate of the vertex of y=-16x^2+32x+48.

Compare this equation to y=ax^2+bx+c to find the values of a,b,\text{ and } c.

a=-16

b=32

c=48.

The x-coordinate of the vertex can be found by evaluating:

\frac{-b}{2a}=\frac{-32}{2(-16)

\frac{-b}{2a}=\frac{-32}{-32}

\frac{-b}{2a}=1

So the x-coordinate of the vertex is 1.

The y-coordinate can be found be evaluating y=-16x^2+32x+48 at x=1:

y=-16(1)^2+32(1)+48

y=-16+32+48

y=16+48

y=64

So the maximum height of the rocket is 64 ft high.

b)

When the rocket hit's the ground the height that the rocket will be from the ground is 0 ft.

So we are trying to find the second t such that:

0=-16t^2+32t+48

I'm going to divide both sides by -16:

0=t^2-2t-3

Now we need to find two numbers that multiply to be -3 and add to be -2.

Those numbers are -3 and 1 since (-3)(1)=-3 and (-3)+(1)=-2.

0=(t-3)(t+1)

This implies we have either t-3=0 or t+1=0

The first equation can be solved by adding 3 on both sides: t=3.

The second equation can be solved by subtracting 1 on both sides: t=-1.

So when t=3 seconds, is when the rocket has hit the ground.

5 0
3 years ago
If you are also able to explain this please do! I'd greatly appreciate it!
pogonyaev
You're given a table of x values and an equation. To solve, plug in the values for x.

First box: y=2(-3)-1=-7
Second box: y=2(-2)-1=-5.

See if you can solve the third one.
7 0
3 years ago
Read 2 more answers
Is 85/136 equal to 15/24
Aleks04 [339]

Answer:yes

Step-by-step explanation:

(85/136)=.625

(15/24)=.625

5 0
3 years ago
Read 2 more answers
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