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3 years ago

What is 10 times as much as 0.4

Mathematics

2 answers:

oksian1 [2.3K]3 years ago

8 0

0.04 , is your answer.

Vlad [161]3 years ago

6 0

.4 is 10 times as much of 0.4

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Find the arthmetic and the geometric means of 4 and 9

horrorfan [7]

Answer:

Step-by-step explanation:

first term (a) = 4

last term (b) = 9

Arithmetic mean (AM)

= ( a + b) / 2

= ( 4 + 9 ) / 2

= 13/2

= 6.5

Geometric mean (GM)

= √a *b

=√4 * 9

=√36

= 6

hope it helps :)

3 0

3 years ago

Solve the following linear quadratic system of equations algebraically. y=^2+3x-2 y+3=5x

USPshnik [31]

Answer:

$x=1$

$y=2$

Step-by-step explanation:

$y=x^2+3x-2$ , $y+3=5x$

Replace all occurrences of $y$ in $y+3=5x$ with $x^2+3x-2.$

$(x^2+3x-2)+3=5x$

$y=x^2+3x-2$

Add $-2$ and 3.

$x^2+3x+1=5x$

$y=x^2+3x-2$

Subtract 5x from both sides of the equation.

$x^2+3x+1-5x=0$

$y=x^2+3x-2$

Subtract 5x from 3x.

$x^2-2x+1=0$

$y=x^2+3x-2$

Rewrite 1 as $1^2$ .

$x^2-2x+1^2=0$

$y=x^2+3x-2$

Check that the middle term is two times the product of the numbers being squared in the first term and third term.

$2x=2$ · $x$ · $1$

$y=x^2+3x-2$

Rewrite the polynomial.

$x^2-2$ · $x$ · $1$ $+$ $1^2=0$

$y=x^2+3x-2$

Factor using the perfect square

trinomial rule $a^2-2ab+b^2=(a-b)^2,$

where a = x and b = 1.

$(x-1)^2=0$

$y=x^2+3x-2$

Set the $x-1$ equal to 0.

$x-1=0$

$y=x^2+3x-2$

Add 1 to both sides of the equation.

$x=1$

$y=x^2+3x-2$

Replace all occurrences of $x$ in

$y=x^2+3x-2$ with 1.

$y=(1)^2+3(1)-2$

$x=1$

$y=2$

3 0

3 years ago

what is the equation in slope-intercept form for the line that passes through (3, 7) and is perpendicular to 3x-5x=8

Galina-37 [17]

Answer:

$5x + 3y = 36$

Step-by-step explanation:

First we need to rewrite 3x-5y=8 in slope-intercept form.

$y = \frac{3}{5} x - \frac{8}{5}$

The slope of this line is

$\frac{3}{5}$

The line perpendicular to this line will have a slope that is the negative reciprocal of 3/5, which is

$m = - \frac{5}{3}$

This line passes through (3,7).

The equation is given by:

$y-y_1=m(x-x_1)$

We substitute the point and slope to get:

$y - 7 = - \frac{5}{3} (x - 3)$

We multiply through by 3 to get:

$3y - 21 = - 5(x - 3)$

Expand to obtain:

$3y - 21 = - 5x + 15$

$3y + 5x = 15 + 21$

$5x + 3y = 36$

6 0

3 years ago

You bought 12 packs of face mask.Some packs contain 5 pieces and some have 3 pieces.There are 40 face masks altogether.Illustrat

irina1246 [14]

Answer:need points

Step-by-step explanation:

6 0

3 years ago

Here is a data set: 5 10 10 10 15 100 after studying the data, the research realized that the value 100 was meant to be recorded

attashe74 [19]

Answer:

The mean and SD will change

The median is a better measure of the center since it will not change in this case

Step-by-step explanation:

Given that the value 100 was changed to 15, what will happen is that the value of the mean will decrease since there is a lower total value now. This will consequently decrease the value of the standard deviation too.

Yes, the median will be a better choice

This is because, by changing the value of 100 to 15, the value of the median stays the same and thus the previous information would not be changed if the median we used .

5 0

3 years ago