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adell [148]
3 years ago
8

Factor.

Mathematics
1 answer:
saul85 [17]3 years ago
4 0
The answer is B. (2x + 3)(4x - 1), because when you expand it you get 8x^2 + 10x - 3

2x × 4x = 8x^2
3 × 4x = 12x
2x × -1 = -2x
3 × -1 = -3

I hope this helps!
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The length of time a person takes to decide which shoes to purchase is normally distributed with a mean of 8.54 minutes and a st
Minchanka [31]

Answer:

0.0323 = 3.23%. Is unusual

Step-by-step explanation:

Using the normal distribution we can find z value with the mean and standard deviation as follows. x is the value we want to know its probability

z = (x - mean)/standard deviation

z = (5-8.54)/1.91

z = -1.85

Using z tables for normal distribution, for z = 1.85, we have an area under the curve of 0.9677. Since we want to know the probability for 5 minutes or less, we have to substract from

p = 1- 0.9677

p = 0.0323

An event with a probability less than 5% is considered unusual.

8 0
3 years ago
Y=4x+5 has a gradient of 4. What is the equation of a line parallel to it?
Setler79 [48]
It is -3,-2 is<span> Y=4x+5</span>
8 0
3 years ago
What is the square root of 18 plus the square root of 2? And is it rational or irrational?<br>​
kicyunya [14]
The answer is (rounded to the nearest tenth) about 5.7 and since neither 18 or 2 have a perfect square, so this is irrational.
6 0
3 years ago
What is the midpoint of the vertical line segment graphed below? (2, 4), (2, -9) A. (4, -5). B. (2, -5/2). C. (2, -5). D. (4, 5/
omeli [17]

Answer:

B. (2, -\frac{5}{2})

Step-by-step explanation:

Given:

(2, 4) and (2, -9)

Required:

Midpoint of the vertical line with the above endpoints

Solution:

Apply the midpoint formula, which is:

M(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2})

Where,

(2, 4) = (x_1, y_1)

(2, -9) = (x_2, y_2)

Plug in the values into the equation:

M(\frac{2 + 2}{2}, \frac{4 + (-9)}{2})

M(\frac{4}{2}, \frac{-5}{2})

M(2, -\frac{5}{2})

8 0
2 years ago
Help ASAP I’ll mark you as brainlister PLEASE!!’
Alex17521 [72]

Answer:

A = 76.8 yd²

Step-by-step explanation:

The area (A) of a regular polygon is calculated as

A = \frac{1}{2} pa ( p is the perimeter and a the apothem )

Here p = 8 × 4 = 32 yd and a = 4.8 yd , then

A = \frac{1}{2} × 32 × 4.8 = 16 × 4.8 = 76.8 yd²

8 0
3 years ago
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