What is the step by step answer of 3 + 1 1/4=

Mathematics

2 answers:

ivann1987 [24]3 years ago

6 0

Ok so first u would add 3+1 which gives u 4 and then add 1/4 which should give u 4 1/4

nydimaria [60]3 years ago

5 0

First, let's make 1 1/4 into a improper fraction. So 1 whole is 4/4 and then add the 1/4. So 4/4+1/4 is 5/4. Now let's make 3 into the same common denominator. So 3=3/1. Now let's use the identity property to multiply it by 4, since we want the common denominator to be 4. 3/1 x 4/4 is 12/4. Now we can finally add. When we add, we only add the numerators. So 12/4+5/4 is 17/4. The fraction symbol is another way saying division. So 17 divided by 4 is 4 r 1. We make the remainder into a fraction and use 4 as a whole number. So our answer is 4 1/4.

Real answer: 4 1/4

Hope I helped.

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A ball is thrown straight out at 80 feet per second from an upstairs window that's 15 feet off the ground. Find the ball's horiz

Alex73 [517]

Answer:

Step-by-step explanation:

In order to find the horizontal distance the ball travels, we need to know first how long it took to hit the ground. We will find that time in the y-dimension, and then use that time in the x-dimension, which is the dimension in question when we talk about horizontal distance. Here's what we know in the y-dimension:

a = -32 ft/s/s

v₀ = 0 (since the ball is being thrown straight out the window, the angle is 0 degrees, which translates to no upwards velocity at all)

Δx = -15 feet (negative because the ball lands 15 feet below the point from which it drops)

t = ?? sec.

The equation we will use is the one for displacement:

Δx = $v_0t+\frac{1}{2}at^2$ and filling in:

$-15=(0)t+\frac{1}{2}(-32)t^2$ which simplifies down to

$-15=-16t^2$ so

$t=\sqrt{\frac{-15}{-16} }$ so

t = .968 sec (That is not the correct number of sig fig's but if I use the correct number, the answer doesn't come out to be one of the choices given. So I deviate from the rules a bit here out of necessity.)

Now we use that time in the x-dimension. Here's what we know in that dimension specifically:

a = 0 (acceleration in this dimension is always 0)

v₀ = 80 ft/sec

t = .968 sec

Δx = ?? feet

We use the equation for displacement again, and filling in what we know in this dimension:

Δx = $(80)(.968) +(0)(.968)^2$ and of course the portion of that after the plus sign goes to 0, leaving us with simply:

Δx = (80)(.968)

Δx = 77.46 feet

5 0

3 years ago

What is y=x+2and 2x+y=8

Leya [2.2K]

Answer:

1. x=y−2

2. -1/2y + 4

Step-by-step explanation:

5 0

3 years ago

Solve and in standard form please. you must add. this is from khan academy

Sindrei [870]

We are asked to sum the two trinomials $(-4f^3-5f+16)+(4f^2-f+9)$ . We can start by using the distributive property to remove the parenthesis, giving us $-4f^3-5f+16+4f^2-f+9$ . Next, when we combine like terms, we get $\boxed{-4f^3+4f^2-6f+25}$ . Hope this helped!