All categories

2 years ago

Find the value of z.

Mathematics

1 answer:

worty [1.4K]2 years ago

8 0

9514 1404 393

Answer:

Z ≈ 1.25027

Step-by-step explanation:

There is really no substitute for a good probability table, app, or calculator. Any of these, or a spreadsheet, will tell you the value of Z is about 1.25027.

The attachment shows a spreadsheet computation.

You might be interested in

students for A High School football games in bleachers along one side of the field altogether the bleachers seat 1152 students i

defon

109 students can be seted in a row
All you have to do is 1152/16

4 0

3 years ago

Read 2 more answers

HELPPPPPPPLLL

love history [14]

Answer:

Step-by-step explanation:

4:2

2x4 = 8

4x4=16

7 0

2 years ago

What is the sum of (3x^2+ 5x +6) and (25x^3+ 10x² + 7x– 3)

muminat

Answer:

25x³ + 13x² + 12x + 3

Step-by-step explanation:

(3x²+ 5x +6) + (25x³ + 10x² + 7x– 3)

3x²+ 5x + 6 + 25x³+ 10x² + 7x – 3

25x³ + 3x² + 10x² + 5x + 7x + 6 - 3

25x³ + 13x² + 12x + 3

6 0

3 years ago

A positive real number is 2 less than another. When 4 times the larger is added to the square of the smaller, the result is 49.

Kobotan [32]

Answer:

The numbers are

$-2+3\sqrt{5}$ and $3\sqrt{5}$

Step-by-step explanation:

Let

x -----> the smaller positive real number

y -----> the larger positive real number

we know that

A positive real number is 2 less than another

$x=y-2$

$y=x+2$ ----> equation A

When 4 times the larger is added to the square of the smaller, the result is 49

$4y+x^2=49$ ----> equation B

substitute equation A in equation B

$4(x+2)+x^2=49$

solve for x

$x^2+4x-41=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^2+4x-41=0$

$a=1\\b=4\\c=-41$

substitute in the formula

$x=\frac{-4\pm\sqrt{4^{2}-4(1)(-41)}} {2(1)}$

$x=\frac{-4\pm\sqrt{180}} {2}$

$x=\frac{-4\pm6\sqrt{5}} {2}$

$x=-2\pm3\sqrt{5}$

The positive real number is

$x=-2+3\sqrt{5}$

Find the value of y

$y=x+2$

$y=-2+3\sqrt{5}+2$

$y=3\sqrt{5}$

6 0

4 years ago

719 = (78 × 9) + ____ find the unknown number

viva [34]

Answer: 17

Step-by-step explanation:

78 x 9

=702

702 -719

= 17

4 0

3 years ago

Read 2 more answers