I’m my daughter with math. how to round 38.09

answer:

if its to the nearest tenth its 38.1

if its to the nearest whole number its 38

step-by-step explanation:

answer:

38.1 but if you mean by positive numbers 38

step-by-step explanation:

this is how to round 38.09 to the nearest tenth.

first note that 38.09 has two parts. the integer part to the left of the decimal point and the fractional part to the right of the decimal point:

integer part: 38

fractional part: 09

to round 38.09 to nearest tenth means to round the numbers so you only have one digit in the fractional part.

we use the following rules to round 38.09 to the nearest tenth:

a) if the last digit in the fractional part of 38.09 is less than 5, then simply remove the last the digit of fractional part.

b) if the last digit in the fractional part of 38.09 is 5 or more and the first digit in the fractional part is less than 9, then add 1 to the first digit of the fractional part and remove the second digit.

c) if the last digit in the fractional part of 38.09 is 5 or more and the first digit in the fractional part is 9 then add 1 to the integer part and make the fractional part 0.

with 38.09, rule b applies and the answer is:

38.1

15 units use socratic

step-by-step explanation: 15 units

a.   we have two

lines:   y = 4-x   and  

y = 8-x^-1

given two simultaneous equations that are both to be

true, then the solution is the points where the lines cross. the intersection is

where the two equations are equal. therefore the solution that works for both

equations is when

4-x = 8-x^-1

this is where the two lines will cross and that is the

common point that satisfies both equations.

b.   4-x = 8-x^-1

  x           4-x       8-x^-1

-3           7        

8.33

-2           6         8.5

-1           5         9

  0           4        

-

  1           3        

7

  2           2        

7.5

  3           1         7.67

the table shows that none of the x values from -3 to 3 is

the solution because in no case does

4-x = 8-x^-1

to find the solution we need to rearrange the equation to

find for x:

4-x = 8-x^-1

multiply both sides with x:

4x-x^2 = 8x-1

x^2+4x-1=0

x= -4.236, 0.236

therefore there are two points that satisfies the

equation.

find y:  

x=-4.236

y = 4-x   = 4 – (-4.236)

= 8.236

y = 8-x^-1 =   .236)^-1

= 8.236

x=0.236

  y = 4-x   = 4 – (0.236) = 3.764

y = 8-x^-1 =   8-(0.236)^-1

= 3.764

thus the two lines cross at 2 points:

(-4.236, 8.236) & (0.236, 3.764)

c.   to solve

graphically the equation 4-x = 8-x^-1

we would graph both lines: y = 4-x   and   y

= 8-x^-1

the point on the graph where the lines cross is the

solution to the system of equations.

just graph the points on part b on a cartesian coordinate

system and extend the two lines.   the

solution is, as stated, the point where the two lines cross on the graph.

step-by-step explanation:

mark brainliest!