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3 years ago

Helpppp pleaseeeeeee

Mathematics

2 answers:

aalyn [17]3 years ago

7 0

For this case we have the following expression:

$(3x + 8) (3x-3)$

We apply distributive property, which by definition establishes that:

$(a + b) (c + d) = ac + ad + bc + bd$

So:

$(3x + 8) (3x-3) =\\9x ^ 2-9x + 24x-24 =\\9x ^ 2 + 15x-24$

Answer:

$9x ^ 2 + 15x-24$

Ksenya-84 [330]3 years ago

6 0

Answer:

so find the value of x and maltiply. add 8 maltiply 3 times x and subtract 3

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Solve for x. rs/x=1/4

Anit [1.1K]

Let's solve for x.rsx=14
Step 1: Multiply both sides by x.rs=14x
Step 2: Flip the equation.14x=rs
Step 3: Divide both sides by 1/4.14x14=rs14x=4rs
Answer:x=4rs

8 0

3 years ago

Read 2 more answers

Snape has 2000 mL of a magic potion solution that is 30% DeMuggle Juice. He also has hundreds of 25 mL bottles that are full of

ELEN [110]

Answer:

Step-by-step explanation:

We use the equation for the percentage of solute concentration in a solution:

$volume percent = \frac{volume of solute}{volume of solution} * 100$ (1)

In this case the equiation (1) is transformed into:

$34 = \frac{Total volume of DeMuggle juice}{Total volume of the magic potion} * 100$ (2)

n = number of times he must waves his wand to have a solution that is at least 34% DeMuggle juice.

Vpo = Initial volume of the magic potion = 2000ml

Vjo= Initial volume of DeMuggle juice = 30% * Vpo = (0.3)2000 = 600ml

Vb= Volume of a bottle = 25ml

Vjb = DeMuggle juice volume in a bottle = 75% * Vb = (0.75)25= 18.75ml

Vpmt = Total volume of the magic potion = 2000 + 25*n = Vpo + Vb * n

Vjt = Total volume of DeMuggle juice = 600 + 18.75*n = Vjo + Vjb * n

Replacing in (2):

$34 = \frac{600 + 18.75*n }{2000 + 25*n} *100$

$\frac{34}{100} (2000 + 25*n) = (600 + 18.75* n)$

$680+8.5*n=600+18.75*n$

$80 = 10.25*n$

$n = 7.8$

Since the number of times the wand should be waved must be an integer, it approximates 8

Replacing n=8 in (1)

$\frac{600+(18.75*8)}{2000+(25*8)} *100 = 34.0909$

6 0

4 years ago

Seema’s farther is thrice as old as Seema. After 12 years he will be just twice his daughter. Find their present ages

Nitella [24]

Answer:

Step-by-step explanation:

Let the age of Seema be x and her father be 3x

After 12 years,

Age of Seema=x+12

Age of father=3x+12

Now we have,

$3x+12=2(x+12)\\\\3x+12=2x+24\\ 3x-2x=24-12\\x=12$

Again,

Present age of her father=3x=3×12=36

Hence, the present age of Seema is 12 and her father is 36.

7 0

3 years ago

Guys i need help on this problem I'm stuck

Norma-Jean [14]

Answer:

y=mx+b is slope intercept form

Step-by-step explanation:

letter B :)

6 0

3 years ago

Read 2 more answers

PLEASE HELP ME ON THIS

prohojiy [21]

This is in the form mx + b
so,
g(x) = -3x - 5 + 9
-3x + 4
the b is the y-int
y-int = 4

8 0

3 years ago