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denis-greek [22]
3 years ago
11

Explain how an estimate help you to place the decimal point when multiplying 3.9x5.3?

Mathematics
1 answer:
trapecia [35]3 years ago
6 0
You can estimate 3.9 times 5.3 to 4 times 5 which is 20
so if the answer is around 20, you know that you will have exactly 2 digits before the decimal place
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The perimeter of a triangle is 64cm ,the sides are the ratio 6:5:5 , work out the area of the triangle
Fofino [41]
The area is 192 cm^2

the sides are 20 20 24 with the base being 24

to figure out the height you have to use Pythagorean theorem of the triangle cut in half so 12^2 + b^2 = 20^2
b= 16 = height

b*h* .5= area 16* 24* .5= 192
4 0
3 years ago
Use the distance formula distance, to find the distance to the nearest tenth , between each pair of points A(6,2) and D(-3,-2)
marusya05 [52]

Answer:

The distance between A and D to the nearest tenth is;

9.8\text{ units}

Explanation:

Given the two points;

A(6,2)\text{ and D(-3,-2)}

Applying the distance between two points formula;

d=\sqrt[]{(x_2-x_1)^2+(y_2-y_1)^2}

substituting the given coordinates we have;

\begin{gathered} AD=\sqrt[]{(-3-6)^2+(-2-2)^2} \\ AD=\sqrt[]{(-9)^2+(-4)^2} \\ AD=\sqrt[]{81+16} \\ AD=\sqrt[]{97} \end{gathered}

Simplifying;

\begin{gathered} AD=9.8488578 \\ AD\approx9.8 \end{gathered}

Therefore, the distance between A and D to the nearest tenth is;

9.8\text{ units}

4 0
1 year ago
A decrease in the price of a particular product will result in Question 7 options: a decrease in the demand for that product. a
sattari [20]

The answers you could use are both the second and the forth.  But mostly the fourth.

6 0
3 years ago
Read 2 more answers
PLEASE HELP ASAP!!!!!!
zhannawk [14.2K]
The answer is A  to change an exponent from negative to positive, just move it into either the numerator or denominator depending on where it is to begin with. 
7 0
3 years ago
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How much is a 20% increase to $771?
Irina-Kira [14]

Answer:

$154.20

Step-by-step explanation:

To find a percent of a number, multiply the percent by the number.

20% of $771 =

= 20% * $771

= 0.2 * $771

= $154.20

The increase is $154.20

5 0
3 years ago
Read 2 more answers
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