All categories

2 years ago

Reduce 72:81 to its simplist form

2 answers:

8 0

$\frac { 72 }{ 81 } \\ \\ =\frac { 8 }{ 9 } \cdot \frac { 9 }{ 9 } \\ \\ =\frac { 8 }{ 9 } \cdot 1\\ \\ =\frac { 8 }{ 9 }$

Dmitry_Shevchenko [17]2 years ago

4 0

Divide by 9/9 and you get 8/9 :)

You might be interested in

What's the equation below thanks

wlad13 [49]

I'm not sure how to display a graph on here, so I'm afraid I can't help you with that part.

However, the answer is C. (-2,3).

To create the graph, either put it into a graphing calculator or manually graph the equations by plugging in different numbers to the equation.

3 0

2 years ago

2. Solve the equation using the quadratic formula. -4x2 + 40x + 16 = 0 Page 1 of 2

kumpel [21]

The solution to given quadratic equation is x = -0.3851 or x = 10.3851

Solution:

Given equation is:

$-4x^2 + 40x + 16 = 0$

To find: solve by quadratic equation formula

$\text {For a quadratic equation } a x^{2}+b x+c=0, \text { where } a \neq 0\\\\x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

Using the above formula,

$\text{ For} -4x^2 + 40x + 16 = 0 \text{ we have } a = -4 ; b = 40 ; c = 16$

Substituting the values of a = -4 ; b = 40 ; c = 16 in above quadratic formula we get,

$\begin{aligned}&x=\frac{-40 \pm \sqrt{40^{2}-4(-4)(16)}}{2 \times-4}\\\\&x=\frac{-40 \pm \sqrt{1600+256}}{-8}\\\\&x=\frac{-40 \pm 43.081}{-8}\\\\&x=\frac{-40+43.081}{-8} \text { or } x=\frac{-40-43.081}{-8}\\\\&x=-0.3851 \text { or } x=10.3851\end{aligned}$

Thus the solution to given quadratic equation is x = - 0.3851 or x = 10.3851

8 0

2 years ago

One fish is 4 feet below sea level. Another fish is 3 feet below sea level. write each position as an integer. Which integer is

inna [77]

The first fish has an integer of -4 and the other fish has an integer of -3.
-3 is greater because -4 is one less of -3. If you put it on a line then -3 is closer to the 0 then -4.

3 0

3 years ago

Read 2 more answers

100 cm is equal to: A. 0.1 m B. 1,000 m C. 10 m D. 1 m

Scrat [10]

Answer:

D. 1 m

Step-by-step explanation:

100 cm = 1 m

This is a conversion factor

3 0

3 years ago

Read 2 more answers

Find the area of each figure. (Or as much as u can)

Elenna [48]

9514 1404 393

Answer:

7. 91 m²

8. 56 in²

9. 105 in²

10. 135 m²

Step-by-step explanation:

The formula for the area of a triangle is ...

A = 1/2bh

where b is the base length, and h is the height perpendicular to the base.

The formula for the area of a trapezoid is ...

A= 1/2(b1 +b2)h

where b1 and b2 are the lengths of the parallel bases, and h is the perpendicular distance between them. Note that this formula is virtually identical to the triangle formula, with the triangle 'b' being replaced by (b1+b2).

Fill in the numbers and do the arithmetic. The result is shown in the attachment. (We have used the triangle formula for all, with b1+b2 being used for 'b' to find the area of the trapezoids.)

7. A = 1/2(14 m)(13 m) = 91 m²

8. 56 in²

9. A = 1/2(14 +16 in)(7 in) = 105 in²

10. 135 m²

5 0

2 years ago