84is 30% of what number

Mathematics

1 answer:

4vir4ik [10]3 years ago

3 0

Answer:

84is 30% of what number? 280

Step-by-step explanation:

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If f x) = [x – 3], find f (5.6 ).

Levart [38]

Answer:

2.6

Step-by-step explanation:

We have the function f (x) = [x – 3]

We need to inster the value required which is 5.6

f (5.6) = [5.6 – 3]=

5.6-3 =2.6

f (5.6)=2.6

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3 years ago

Hayden has 6 rolls of dimes. There are 50 dimes in each roll. How many dimes does he have altogether

Olegator [25]

he has 300 dimes in total

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3 years ago

Calculate the sum of the infinite series 98+84+72+432/7+...

bogdanovich [222]

ANSWER

$S_\infty= 686$

EXPLANATION

The given infinite series is

$98 + 84 + 72 + \frac{432}{7} + ...$

The sum to infinity of this series is given by the formula,

$S_\infty= \frac{a_1}{1 - r}$

where the first term of this infinite geometric series is

$a_1 = 98$

and the common ratio is
$r = \frac{a_2}{a_1}$

$r = \frac{72}{98} = \frac{6}{7}$

We substitute these values to obtain,

$S_\infty= \frac{98}{1 - \frac{6}{7} }$

We simplify the denominator to get,

$S_\infty= \frac{98}{\frac{1}{7} }$

This simplifies to

$S_\infty= 98 \times 7 = 686$

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3 years ago

Read 2 more answers

The sum of three consecutive even integers is -78, what are the integers ?

Digiron [165]

First, you need to analize and understand the problem, then you must choose and strategy. There is a wide variety of strategies to solve a mathematical problem, in this case, you can use the following, which is based on the information given above:
1. You have that the sum of three consecutive even integers is $-78$ , therefore, you can given the variable $x
$ to the first integer, the second even integer is $x+2$ and the third one is $x+4
$ .
2. Calculate x:
 $x+(x+2)+(x+4)=-78$ 
 $3x+6=-78$
 $x=-28
$ 
 $x+2=-28+2=-26
$ 
 $x+4=-28+4=-24
$ 
Therefore, the answer is: $-28,-26,-24
$