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2 years ago

Please help me !

Mathematics

2 answers:

Alik [6]2 years ago

8 0

Solve for x in the second equation first

kumpel [21]2 years ago

8 0

Answer:

Solve for x in the second equation.

Step-by-step explanation:

To solve a system of equations by substition you have to solve one of the equations for X or Y and then substitute that value on the X of the other equation, if you want to avoid fractions, you can use the x of the secon equation, like this:

$6x+18y=24\\6x=24-18y\\x=\frac{24-18y}{6} \\x=4-3y$

So by solving X for the second equation you avoided fractions when substituting the value for X on the first equation.

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A box has a volume of 144 in3 and a height of 4 1/2 in.What is the base area of the box?

Zepler [3.9K]

Box volume can be computed by getting the base area multiplied by the total height.

in formula for volume we have,

V = Base Area x H. Given the Volume of 144 cu in and H = 4.5 in. we can solve for Base Area (BA)

Volume (144 cu in) = BA x Height (4.5 in)

BA = 144 cu in/4.5 in

Base Area = 32 square inches

8 0

2 years ago

Keesha Thompsons cousin is 8 years older than keesha. Write an expression for the age of keesha's cousin

Oliga [24]

Answer:

y = 8 + x or

Keesha.cousin.age = 8 + Keesha.age

Step-by-step explanation:

II. When Keesha.cousin is older than Keesha 8 years

Give y = 8 + x, when y is Keesha cousin.age, x is Keesha.age

y = 8 + x

II. Prove by given Keesha is 10 years old.

y = 8 + 10

y = 18 or Keesha cousin is 18 years old.

Hope that help :)

3 0

2 years ago

Complete the table for the given rule. Rule: y=X/4(fraction)

Lady_Fox [76]

Answer:

$\large\huge\boxed{\begin{array}{c|c}x&y\\\\4&1\\\\2&\frac{1}{2}\\\\9&\frac{9}{2}\end{array}}$

Step-by-step explanation:

$y=\dfrac{x}{4}$

Put the values of x from the table to the equation:

$x=4\to y=\dfrac{4}{4}=1\\\\x=2\to y=\dfrac{2}{4}=\dfrac{2:2}{4:2}=\dfrac{1}{2}\\\\x=9\to y=\dfrac{9}{4}$

From the comment.

Convert the equation:

$y=\dfrac{x}{4}$ <em>multiply both sides by 4</em>

$4y=x\to x=4y$

Put the values of y from the table to the equation:

$y=4\to x=(4)(4)=16\\\\y=2\to x=(4)(2)=8\\\\y=9\to x=(4)(9)=36$

$\large\huge\boxed{\begin{array}{c|c}x&y\\\\16&4\\\\8&2\\\\36&9\end{array}}$

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2 years ago

When working through limit problems, why must you write the limit statement every time until you evaluate the equation?

Softa [21]

Because that how it goes

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2 years ago

What is the equation of the midline for the function f(x) ?

Inessa05 [86]

let's recall the graph of sin(x), is simply a sinusoidal line waving about, but its midline is at the x-axis, namely y = 0.

this equation is simply a transformation of it, the 1/2 changes the amplitude by half, midline stays the same though, the +3, moves the whole thing upwards, a vertical shift of 3, meaning the midline went from 0 to 3, y = 3.

5 0

2 years ago