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3 years ago

Smiplify d equation

Mathematics

2 answers:

Reptile [31]3 years ago

5 0

21/4

1.)Rewrite into fraction: 3/1 * 7/4
2.)Multiply: 21/4

Semmy [17]3 years ago

4 0

Answer:

$\frac{21}{4}$

Step-by-step explanation:

Given

3 × $\frac{7}{4}$ ← can be expressed as

$\frac{3}{1}$ × $\frac{7}{4}$

Multiply numerators/ denominators, that is

= $\frac{3(7)}{1(4)}$

= $\frac{21}{4}$

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X + 5 + (-1) = -5x - 1

coldgirl [10]

Answer:

-5/6 as fraction form

-0.83 as decimal form

Step-by-step explanation:

Good Luck

7 0

3 years ago

Read 2 more answers

The following are weights in pounds of a college sports team: 165, 171, 174, 180, 182, 188, 189, 192, 198, 202, 202, 225, 228, 2

babunello [35]

Answer:

There are no values in the data that is two standard deviations below the mean.

Step-by-step explanation:

We are given the following data set in question:

165, 171, 174, 180, 182, 188, 189, 192, 198, 202, 202, 225, 228, 235, 240

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{2971}{15} = 198.06$

The mean of sample is 198.06 pounds.

Sum of squares of differences = 7984.93

$S.D = \sqrt{\dfrac{7984.93}{14}} = 23.88$

The sample standard deviation is 23.88 pounds.

We have to find the weight that is 2 standard deviations below the mean.

$x < \bar{x}- 2s\\x < 198.06 -2(23.88)\\x < 150.3$

Thus, we have to find a value less than 150.3.

Sorted data: 165, 171, 174, 180, 182, 188, 189, 192, 198, 202, 202, 225, 228, 235, 240

There are no values in the data that is less than 150.3

4 0

4 years ago

Burka [1]

Answer:

$2x^2+13$

Step-by-step explanation:

Given

$(-5x^2-2x+4)+(8x^2-x-1)-(x+2)(x-5)$

Required

Simplify

Expand brackets

$(-5x^2-2x+4)+(8x^2-x-1)-(x^2-5x+2x-10)$

$(-5x^2-2x+4)+(8x^2-x-1)-(x^2-3x-10)$

Open all brackets

$-5x^2-2x+4+8x^2-x-1-x^2+3x+10$

Collect Like Terms

$-5x^2+8x^2-x^2-2x-x+3x+4-1+10$

$2x^2+13$

<em>Hence, the polynomial simplifies to </em> $2x^2+13$ <em> and it has a degree of 2</em>

5 0

3 years ago

One leg of a right triangle is 3 millimeters longer than the shorter leg and the hypotenuse is 6 millimeters longer than the sho

ankoles [38]

Suppose the shorter leg is x, then the longer leg is x+3, and the hypotenuse is x+6
x^2 +(x+3)^2 =(x+6)^2
x^2 + x^2 + 6x +9=x^2 + 12x +36
x^2-6x-27=0
(x+3)(3-9)=0
x=-3, which is impossible, or x=9
so the shorter leg is 9mm, the longer leg is 12mm, and the hypotenuse is 15mm

5 0

3 years ago

A soccer player scores 3 goals in 2 games. How many goals are they expected to score in 9 games? Answer without units

irakobra [83]

Answer:

13 and a half

Step-by-step explanation:

3 0

3 years ago

Smiplify d equation​

Smiplify d equation