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3 years ago

6

2x + 5 = 10

2 answers:

Slav-nsk [51]3 years ago

5 0

The solution is subtraction<span>. The first step in solving this </span>equation<span> is subtracting 5 from each side of the </span>equation<span>.</span>

hammer [34]3 years ago

3 0

There are many ways you can start off by solving an equation. In this case, the first operation used in solving this equation would be subtraction. You would have to subtract 5 from each side.

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What is the positive solution to the equation 0=1/3x^2-3

fgiga [73]

Let's solve your equation step-by-step.<span>0=<span><span><span>13</span><span>x2</span></span>−3</span></span>Step 1: Subtract 1/3x^2 from both sides.<span><span>0−<span><span>13</span><span>x2 </span></span></span>= <span><span><span><span>13</span><span>x2</span></span>−3</span>−<span><span>13</span><span>x2</span></span></span></span><span><span><span><span>−1</span>3</span><span>x2 </span></span>= <span>−3</span></span>Step 2: Divide both sides by (-1)/3.<span><span><span><span><span>−1</span>3</span><span>x2 </span></span><span><span>− 1</span>3</span></span>=<span><span>− 3 </span><span><span>−1</span>3</span></span></span><span><span>x2 </span>= 9</span>Step 3: Take square root.<span>x=<span>±<span>√9</span></span></span><span><span>x=<span><span>3<span> or </span></span>x</span></span>=<span>−3</span></span>Answer:<span><span>x=<span><span>3<span> or </span></span>x</span></span>=<span>−<span>3</span></span></span>

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3 years ago

Which answer represents the series in sigma notation -3+(-1)+1+3+5

professor190 [17]

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Step-by-step explanation:

8 0

3 years ago

Help please <br> Write and solve a proportion. 22% of 75

tatiyna

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3 years ago

Find the cardinal number of the set<br> C = {x|x € N, 30 < x < 56 and x is divisible by 6},

Naddik [55]

<h3>Answer: 4</h3>

=====================================================

Explanation:

We're given the following

$C = \{ x | x \in \mathbb{N}, \ 30 < x < 56, \ \text{ x is divisible by 6}\}$

which means that we have a set of natural numbers between 30 and 56, excluding both endpoints, and the set of numbers are also multiples of 6.

So looking at the multiples of 6 that are between 30 and 56 leads us to

{30, 36, 42, 48, 54}

but we cross off 30 as we want x to be larger than that, so we get this updated final list

{36, 42, 48, 54}

There are four items in this final list so the cardinality of the set described is 4. The cardinality is just the number of items in a given set.

4 0

4 years ago

The price of a video game increases by 20%, then decreases by 10%. If the final price is $46.98,

Elena-2011 [213]

Answer:

The original price was $43.50

Step-by-step explanation:

Let

x ----> the original price of a video game

we know that

1) The price of a video game increases by 20%

so

$100\%+20\%=120\%=120/100=1.20$

The final price is equal to the original price multiplied by 1.20

so

$1.20x$

2) The price of a video game decreases by 10%

so

$100\%-10\%=90\%=90/100=0.90$

The final price is equal to the price at this moment multiplied by 0.90

so

$0.90(1.20x)=1.08x$

we have that

$1.08x=46.98$

solve for x

$x=46.98/1.08\\x=\$43.50$

4 0

3 years ago