Which is bigger 2/5 or 4/9

Answers

Answer 1

Answer: The easiest way to solve this comparison without any unusual comparisons is to find a common denominator for the two fractions.

2/5 = 18/45
4/9 = 20/45

Since 20/45 is bigger than 18/45, we know that 4/9 is greater than 2/5

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I need help no this

Make a formula to find the of the diameter 'a' if the area is 'A'.

Answers

Answer:

$2\sqrt{(A)/(\pi)} = a$

Step-by-step explanation:

I am assuming that you are referring to the diameter and area of a circle. If this is false, then please note that my answer is wrong.

Ok, we know that the area formula for a circle is A = $\pi r^(2)$ , where r is the radius.

We also know that the diameter, a, is two times the radius. Thus, $a = 2r$ , which also means that $(1)/(2) a = r$ . This means that we can substitute the radius (r) with half the diameter ( $(1)/(2)a$ ) in the area formula equation:

$A = \pi *((1)/(2) a)^(2)$

Your question asks us to find the diameter, which means we must solve for, or isolate, the diameter (a):

$A = \pi *((1)/(2) a)^(2)\n(A)/(\pi) =((1)/(2) a)^(2)\n(A)/(\pi) =(1)/(4) a^(2)\n(4A)/(\pi) = a^(2)\n\sqrt{(4A)/(\pi)} = a\n2\sqrt{(A)/(\pi)} = a$

Evaluate |x + y|, for x = 8 and y = -15.

Answers

First, we substitute the numbers to the corresponding variables.

|(8) + (-15)|

And we change the plus sign since we’re just basically subtracting.

|8 - 15|

|-7|

Now to do absolute values, we must remember that it will always equal a positive unless there is a negative sign outside of the | |.

So the final answer will be 7.

25 + 8(2 + 3) Step 1 = 25 + 8 + 2 + 8 + 3 Explain the mistake Mrs. Garcia made in the first step. 2. See answers.2 answers

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36 votes:
What are the answer choices? Step one should be addition in parenthesis, 2+6, which will give ...

Answers

Answer:

Step 1 should look like this:

25 + 8 × 2 + 8 × 3

Step-by-step explanation:

25 + 8(2 + 3)

Step 1: 25 + 8 + 2 + 8 + 3

The mistake is that the 8 multiplies both numbers in parentheses.

Step 1 should look like this:

25 + 8 × 2 + 8 × 3

Help me with 1,2,3 :)

Answers

1.) 4x and 9 are terms in 4x + 9

2.) The number line represents a solution to an equation.

3.) 9 is a constant in 2n - 6m + 9

Give the first four terms of a geometric sequence having a1=18 and r = 2.

Answers

Hello,

$a_(1)=9*2=18$
$a_(2)=9*2^(2)=36$
$a_(3)=9*2^(3)=72$
$a_(4)=9*2^(4)=144$

$a_(n)=9*2^(n)$

The number of basic headphones the store can purchase if it spends a total of $10,000 on headphones and buys 110 HD headphones for $70 each.

Answers

Answer:

Total amount spent = $10,000

Cost of one HD headphones = $70

So, cost of 110 HD headphones = $70*110=7700$ dollars

Hence, amount left to purchase basic headphones = $10000-7700=2300$ dollars

So, the store can buy x headphones from $2300. Where x can be found by dividing 2300 by the cost of 1 headphones.

The store buys 110 HD head phone for $70 each. That means they spent 110 x 70 = $7,700 on them

$10,000 - $7,700 = $2,300

The store has $2,300 dollars left to spend on basic headphones.

The answer is $2,300 ÷ cost of basic headphones

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