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3 years ago

What is 2times .4 tell me how you solved it sorry I forgot how to do that

Mathematics

2 answers:

Eva8 [605]3 years ago

7 0

2 times 0.4 = 0.8.

0.4
X 2
_____
0.8

olga55 [171]3 years ago

4 0

2
.4

8. Then add the decimal on how many decimal places you have, in this case it is one so you move the decimal once to the left to get .8

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The hypotenuese of an isosceles right triangle is 13 inches. The midpoints of its sides are connected to form an inscribed trian

Georgia [21]

Answer:

The Sum of the areas of theses triangles is 169/3.

Step-by-step explanation:

Consider the provided information.

The hypotenuse of an isosceles right triangle is 13 inches.

Therefore,

$x^2+x^2=169\\2x^2=169\\x=\frac{13}{\sqrt{2} }$

Then the area of isosceles right triangle will be: $A=\frac{1}{2} x^2$

Therefore the area is: $A=\frac{169}{4}$

It is given that sum of the area of these triangles if this process is continued infinitely.

We can find the sum of the area using infinite geometric series formula.

$S=\frac{a}{1-r}$

Substitute $a=\frac{169}{4} \ and\ r=\frac{1}{4}$ in above formula.

$S=\frac{\frac{169}{4}}{1-\frac{1}{4}}$

$S=\frac{\frac{169}{4}}{\frac{3}{4}}$

$S=\frac{169}{3}$

Hence, the Sum of the areas of theses triangles is 169/3.

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2 years ago

In a group of dog 25% are boys. How many girls are there in the class ? Explain

rewona [7]

Answer:

Step-by-step explanation:

identify the known ratio and the unknown ratio.

Set up the proportion.

Cross-multiply and solve.

Check the answer by plugging the result into the unknown ratio.

^^^^^^^^^^^^^^^^^^^^^^^^^^^

is the steps to solve your answer

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3 years ago

Factor each completely. 1) 9r²-26r+16 2) 25b²-9

Elden [556K]

Answer: 1. ( 9r - 8 ) x ( r - 2 )

2. ( 5b - 3 ) x ( 5b + 3 )

Step-by-step explanation:

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2 years ago

4. A sum of money is divided between two friends in the ratio 4:9. If the smaller

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Answer:

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Step-by-step explanation:

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2 years ago

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grin007 [14]

If Connie and her two friends are completing the relay, this means that there are three people.

If they each rode an equal part of the race this means that we must divide the 10 miles (the distance ridden) by 3 (the number of racers).

As a fraction this equals 3 and 1/3 and in a decimal this equals approximately 3.33

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3 years ago