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2 years ago

Choose the two numbers from the box to complete

Mathematics

1 answer:

o-na [289]2 years ago

4 0

Answer:

455 & 571

Step-by-step explanation:

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Evaluate ab-cd /2a+1 when a = 5, b = -4, c = 1, and d = 13

makvit [3.9K]

Step :

5 x (-4) - 1 x 13 -20 - 13 -33

--------------------- = ---------- = -----

2 x 5 + 1 11 11

Ans ; -33/11

3 0

1 year ago

A 10 foot ladder is leaning against a wall. Call x the distance from the top of the ladder to the ground, and call y the distanc

liq [111]

$-5.3\:\text{ft/s}$

Step-by-step explanation:

We start by applying the Pythagorean theorem to the ladder, with its length L as the hypotenuse:

$L^2 = 100\:\text{ft}^2 = x^2 + y^2$

where x is the vertical distance from the top of the ladder to the ground and y is the horizontal distance from the bottom of the ladder to the wall. Taking the derivative of the above expression with respect to time, we get

$0 = 2x\dfrac{dx}{dt} + 2y\dfrac{dy}{dt}$

Solving for dx/dt, we get

$\dfrac{dx}{dt} = -\left(\dfrac{y}{x}\right)\dfrac{dy}{dt} = -\left(\dfrac{\sqrt{L^2 - x^2}}{x}\right)\dfrac{dy}{dt}$

We know that

$\dfrac{dy}{dt} = 4\:\text{ft/s}$

when x = 6 ft. So the rate at which the top of the ladder is going down is

$\dfrac{dx}{dt} = -\left(\dfrac{\sqrt{100\:\text{ft}^2 - (6\:\text{ft})^2}}{6\:\text{ft}}\right)(4\:\text{ft/s})$

$\:\:\:\:\:\:\:= -5.3\:\text{ft/s}$

The negative sign means that the distance x is decreasing as y is increasing.

5 0

2 years ago

What is the decimal form for 3750?

Shtirlitz [24]

Answer:

.3750

Step-by-step explanation:

sorry if this is wrong. I don't understand

3 0

2 years ago

Please help me I need help

kvv77 [185]

Answer:

B: 14

should be right

6 0

2 years ago

Will adding 3 different prime numbers result in a prime number?

Elden [556K]

Well, when you think about it a random set of prime numbers would be 1,3,5,7,11,13...
If you add 1+3+5 you get 9 which isn't a prime number.
Another example is 7+11+13 you get 31 which is a prime number.
So to answer your question: it depends on the type of prime numbers that you use

4 0

2 years ago