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2 years ago

Will mark brainliest!

Mathematics

2 answers:

katovenus [111]2 years ago

6 0

Answer:

4.817+9.099+17.008=30.924

484.603-48.198=436.405

Estimation 5+9+17=31

485-48=437

Just round each decimal to the nearest whole number and add or subtract

Juliette [100K]2 years ago

3 0

Answer:

first blank: 30.924

second blank: 436.405

Step-by-step explanation:

We can estimate by rounding numbers and adding

You might be interested in

List all of the two digit numbers that can be made using the digits 5,7,and 8

LuckyWell [14K]

9514 1404 393

Answer:

57, 58, 75, 78, 85, 87 (no repeats)

add 55, 77, 88 to the above list if repeats are allowed.

Step-by-step explanation:

With no repeating digits, there are 3 ways to choose the first digit, and 2 ways to choose the second digit, for a total of 3×2 = 6 possible numbers

57, 58, 75, 78, 85, 87

If the digits can be repeated, than you can add 55, 77, 88 to that list:

55, 57, 58, 75, 77, 78, 85, 87, 88

3 0

3 years ago

7. Sandra had a coupon for 20% off. It took off $60 from the total cost. What was the original price of the item? Proportion Sol

Liula [17]

I’m pretty sure it’s b tell me if I’m wrong tho~~

6 0

3 years ago

Differentiating a Logarithmic Function in Exercise, find the derivative of the function. See Examples 1, 2, 3, and 4.

wlad13 [49]

Answer:

$\frac{dy}{dx}=\frac{x(1-2lnx)}{x^{4}}$

Step-by-step explanation:

To solve the question we refresh our knowledge of the quotient rule.

For a function f(x) express as a ratio of another functions u(x) and v(x) i.e

$f(x)=\frac{u(x)}{v(x)}\\$ , the derivative is express as

$\frac{df(x)}{dx}=\frac{v(x)\frac{du(x)}{dx}-u(x)\frac{dv(x)}{dx}}{v(x)^{2} }$

from $y=lnx/x^{2}$

we assign u(x)=lnx and v(x)=x^2

and the derivatives

$\frac{du(x)}{dx}=\frac{1}{x}\\\frac{dv(x)}{dx}=2x\\$ .

Note the expression used in determining the derivative of the logarithm function.it was obtain from the general expression of logarithm derivative i.e $y=lnx\\\frac{dy}{dx}=\frac{1}{x}$

If we substitute values into the quotient expression we arrive at

$\frac{dy}{dx}=\frac{(x^{2}*\frac{1}{x})-(2x*lnx)}{x^{4}}\\\frac{dy}{dx}=\frac{x-2xlnx}{x^{4}}\\\frac{dy}{dx}=\frac{x(1-2lnx)}{x^{4}}$

8 0

3 years ago

Simplify expression x^2 - xy + 2x/ 2x, step by step please.

Papessa [141]

Answer:

x^2 - xy + 1

Step-by-step explanation:

x^2 - xy + 2x/2x

2x/2x = 1

x^2 - xy + 1

This is the furthest we can simplify this expression with the given information.

4 0

3 years ago

3. Consider the linear equation 2y - 3x = 5.

nignag [31]

Answer:

Step-by-step explanation:

2y - 3x = 5

2(-2) - 3x = 5

-4 - 3x = 5

-3x = 9

x = -3

(-3,-2) is another solution

(-1,1)

2y - 3x = 5

2(1) - 3(-1) = 5

2 + 3 = 5

5 = 5

true, the point is a solution to the equation because the equation is true after substituting x and y with the point (-1,1)

(4,1)

2y - 3x = 5

2(1) - 3(4) = 5

2 - 12 = 5

-10 = 5

not true, the point is not a solution to the equation because the equation is not true after substituting x and y with the point (4,1)

c. You can use the points from the given (-1,1) and (-3,-2) to form a line. You then shade whichever half solves the solution using points on the graph.

8 0

2 years ago