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3 years ago

Please help!! there is a picture below

Mathematics

1 answer:

ivann1987 [24]3 years ago

6 0

Answer:

for 12 pop songs 8 hip-hop songs would be played

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which equation is the direct variation equation if f(x) varies directly with x and f(x)=-9 when x = 3

fomenos

$\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\textit{we know that }
\begin{cases}
\stackrel{f(x)}{y}=-9\\
x=3
\end{cases}\quad -9=k3\implies \cfrac{-9}{3}=k\implies \boxed{-3=k}
\\\\\\
thus\qquad \qquad \stackrel{f(x)}{y}=-3x$

7 0

3 years ago

How to solve 2a x a x a x3a + b +4b

kodGreya [7K]

Answer:

$6 {a}^{4} + 5b$

Step-by-step explanation:

$2a \times a\times a \times 3 a+ b + 4b \\ 2a \times a = 2 {a}^{2} \\ 2 {a}^{2} \times a = 2 {a}^{3} \\ 2 {a}^{3} \times 3a = 6 {a}^{4} \\b + 4b = 5b$

Therefore the answer is

$6 {a}^{4} + 5b$

3 0

2 years ago

Read 2 more answers

4) A TV is on sale. The TV has been reduced by 20%. The sale price is £540. What was the

OLga [1]

Answer:

675

Step-by-step explanation:

If the price is 20 % off, then we will pay 100-20 = 80 percent of the original price

Let x be the original price

x* 80% = 540

Change to decimal form

x * .80 = 540

Divide each side by .80

.80x / .80 = 540/.80

x =675

The original price is 675

3 0

3 years ago

Find the coordinates of B if A has coordinates (3, 5) and Y(–2, 3) is the midpoint of AB

frez [133]

Answer:

B (-7, 1)

Step-by-step explanation:

All we have to do is set up equations to find coordinate b from midpoint formula.

x-coordinate:

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

-4 = 3 + x

x = -7

y-coordinate:

3 = $\frac{5+y}{2}$

6 = 5 + y

y = 1

6 0

3 years ago

Simplify the following expression.

Blababa [14]

Answer:

-6x

Step-by-step explanation:

I just answered this

it will equal -6x

good luck :)

5 0

4 years ago