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3 years ago

Does anyone know how to do this question?

Mathematics

1 answer:

Setler [38]3 years ago

3 0

Answer:

no im sorry, i cannot solve this

Step-by-step explanation:

for a better answer make sure to post this question again and see what people say

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julsineya [31]

Answer:

a. Step 1

Step-by-step explanation:

When solving equations, in order to isolate the variable (get the 'x' by itselt), you need to use inverse (opposite) operations. In the equation:

l2x - 4l - 3 = 3

Step 1: l2x - 4l = -3 + 3 *this step is incorrect because the inverse of subtraction is addition so the '-3' should be added to both sides:

l2x - 4l - 3 + 3 = 3+ 3

Step 2: l2x - 4l = 6

Step 3: 2x - 4 = 6

Step 4: 2x = 10

Step 5: x = 5

7 0

3 years ago

<img src="https://tex.z-dn.net/?f=x%20%2B%201.2x%20%2B%201%20%3D%20100%20%5C%5C%20%20%5C%5C%20find%20%5C%3A%20x" id="TexFormula1

uysha [10]

Answer: $x=45$

Simplify both sides of the equation

$x+1.2x+1=100$

$(x+1.2x)+(1)=100$ (Combine Like Terms)

$2.2x+1=100$

Subtract 1 from both sides

$2.2x+1-1=100-1\\2.2x=99$

Divide both sides by 2.2

$2.2x/2.2=99/2.2$

$x=45$

4 0

4 years ago

Read 2 more answers

· The volume of Olivia's rectangular lunchbox is 240 cubic inches. The lunchbox has a height of 3 inches, and its length is 2 in

miskamm [114]

The volume of a cuboid is = length × width × height.

Let the width of Olivia's lunch box be 'x'.

Hence the length of Olivia's lunch box shall be 'x + 2'

Also the height of the box is given as 3 inches.

The volume of the box is 240 in³

Substituting in the formula we get

$x(x+2)(3) =240$

Dividing by 3 on both sides

$x(x+2)=80$

Exapnding we get

$x^2+2x=80$

Subtracting 80 from both sides

$x^2+2x-80=0$

Factoring

$(x+10)(x-8)=0$

We get

x= -10 or x = 8

But x cannot be negative

So x = 8

Hence the width of the box is 8 inches.

7 0

4 years ago

Read 2 more answers

Can the sum of two mixed numbers be equal to 2 ? Explain why or why not.

tensa zangetsu [6.8K]

Let

$x=3\frac{1}{2} \\ \\ y=-1\frac{1}{2}$

Find the sum of the mixed numbers x and y

$(x+y)=3\frac{1}{2}+(-1\frac{1}{2})\\ \\(x+y)=2$

therefore

the answer is

Yes, the sum of two mixed numbers be equal to $2$ , only if you include a negative mixed number

6 0

4 years ago

Read 2 more answers

Please help me !!!! Will mark brainliest

stich3 [128]

Answer:

The value of x is 108°

Step-by-step explanation:

Given interior angles of parallelogram are:

$\frac{2}{3}x, x, \frac{2}{3}x\ and x$

The sum of interior angles of a parallelogram is 360°.

We will use this information to find the value of x.

So adding up all the angles and putting the sum equal to 360 we get,

$x+\frac{2}{3}x+x+\frac{2}{3}x = 360$

$2x+\frac{2}{3}x+\frac{2}{3}x = 360\\2x + \frac{4}{3}x = 360$

Taking LCM on left side of the equation, as it involves fraction

$\frac{6x+4x}{3} = 360\\\frac{10x}{3} = 360$

Multiplying both sides by 3

$\frac{10x}{3} * 3 = 360 * 3\\10x = 1080$

Dividing both sides by 10

$\frac{10x}{10} = \frac{1080}{10}\\x = 108$

Hence,

The value of x is 108°

3 0

3 years ago