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3 years ago

Helpppppppppppppppppppppppppppppppppp

Mathematics

1 answer:

denpristay [2]3 years ago

7 0

The 1st pic is D

The 2nd pic is 8 units

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If 40 men took 10 minutes to make 200 toys,how many man will take 40 minutes to make 350 toys?

Viktor [21]

40=4×10=200 toys
160=4×40=350 toys

7 0

3 years ago

Which equation has no solution

Olegator [25]

Answer:

The first option has no solution.

Step-by-step explanation:

The absolute value of any number, whether it be positive or negative, results as positive.

With the equation listed, you CAN NOT obtain a negative number as your result, therefore this equation has NO SOLUTION.

#teamtrees #WAP (Water And Plant)

8 0

3 years ago

What os the mean of 90,90,100,95,95,85,100,100,80,100

trapecia [35]

Answer:93.5

Step-by-step explanation:

1.Add all the numbers up which is 935.

2.divide that amount by how much numbers there are, 10. So do 935 divided by 10 which is 93.5

4 0

3 years ago

Find the length of the following two-dimensional curve. r (t ) = (1/2 t^2, 1/3(2t+1)^3/2) for 0 < t < 16

andrezito [222]

Answer:

r = 144 units

Step-by-step explanation:

The given curve corresponds to a parametric function in which the Cartesian coordinates are written in terms of a parameter "t". In that sense, any change in x can also change in y owing to this direct relationship with "t". To find the length of the curve is useful the following expression;

$r(t)=\int\limits^a_b ({r`)^2 \, dt =\int\limits^b_a \sqrt{((\frac{dx}{dt} )^2 +\frac{dy}{dt} )^2)} dt$

In agreement with the given data from the exercise, the length of the curve is found in between two points, namely 0 < t < 16. In that case a=0 and b=16. The concept of the integral involves the sum of different areas at between the interval points, although this technique is powerful, it would be more convenient to use the integral notation written above.

Substituting the terms of the equation and the derivative of r´, as follows,

$r(t)= \int\limits^b_a \sqrt{((\frac{d((1/2)t^2)}{dt} )^2 +\frac{d((1/3)(2t+1)^{3/2})}{dt} )^2)} dt$

Doing the operations inside of the brackets the derivatives are:

1 ) $(\frac{d((1/2)t^2)}{dt} )^2= t^2$

2) $\frac{(d(1/3)(2t+1)^{3/2})}{dt} )^2=2t+1$

Entering these values of the integral is

$r(t)= \int\limits^{16}_{0} \sqrt{t^2 +2t+1} dt$

It is possible to factorize the quadratic function and the integral can reduced as,

$r(t)= \int\limits^{16}_{0} (t+1) dt= \frac{t^2}{2} + t$

Thus, evaluate from 0 to 16

$\frac{16^2}{2} + 16$

The value is $r= 144 units$

5 0

4 years ago

How to solve this elimination

aleksandrvk [35]

Firstly you have to reduce the 4 variables to a double system of equation with only 2 variables.

Let's say, first we have to eliminate Z:
Take 1st & 3rd equation & multiply each term of the 1st by (- 1). One done you add up the 1st & the 3rd & you will get:
5W - 4x + 2y = - 18
Follow the same methodology to find another equation without z. Once done you will have a system of 2 equation with 2 variable easy to solve,

At the end you will find:
w = -3
x = -2
y = -1
z = 3

4 0

3 years ago