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2 years ago

Jenna often babysits to earn extra money. On Friday nights , she made $42 for for babysitting 3 hours.

Mathematics

1 answer:

aivan3 [116]2 years ago

8 0

She made 14 dollars and hour if that was your question

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What advantages does money have over bartered goods? Check all that apply.

lyudmila [28]

Answer

Money has a set value, and bartered goods do not.

Money is more portable than bartered goods.

Money allows people to easily store value they earn.

8 0

2 years ago

Read 2 more answers

7x(x+4) 7x^2+4 7x^2+28x 8x+4 8x+11

Scilla [17]

Answer:

$7x^2+28x$

Step-by-step explanation:

$7x(x+4)\\\\Multiplication\ is\ distributive\ on\ addition\\\\\Rightarrow 7x(x+4)=7(x\times x+x\times 4)\\\\7x(x+4)=7(x^2+4x)\\\\Multiplication\ is\ distributive\ on\ addition\\\\\Rightarrow 7x(x+4)==7\times x^2+7\times 4x\\\\7x(x+4)=7x^2+28x$

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2 years ago

What is 9.85km to 5000m as a ratio in it's lowest terms

Rzqust [24]

Answer:

197:100

Step-by-step explanation:

9.85km in m =9850m

9850:5000

÷10 ÷10

985:500

÷5 ÷5

197:100

as we can’t simplify any more, this must be the lowest term.

6 0

2 years ago

If sin ⁡x=725, and 0 ∠ x ∠ pi/2, what is the tan (x - pi/4)

krok68 [10]

$Tan(x-\frac{\pi }{4}) = \frac{-17}{31}$

Step-by-step explanation:

Here we have , sin ⁡x=7/25( given sin x = 725 which is not possible ) , $0$ . Let's find tan (x - pi/4):

⇒ $Tanx = \frac{sinx}{cosx}$

⇒ $Tanx = \frac{sinx}{\sqrt{1-(sinx)^{2}}}$

⇒ $Tanx = \frac{\frac{7}{25}}{\sqrt{1-(\frac{7}{25})^{2}}}$

⇒ $Tanx = {\frac{7}{25}}{\sqrt{(\frac{625}{625-49})^{}}}$

⇒ $Tanx = {\frac{7}{25}}(\frac{25}{24} )$

⇒ $Tanx = {\frac{7}{24}}$

Now , $Tan(x-\frac{\pi }{4}) = \frac{Tanx - Tan(\frac{\pi }{4} )}{1+ Tanx(Tan(\frac{\pi }{4} )}$

⇒ $Tan(x-\frac{\pi }{4}) = \frac{Tanx -1}{1+ Tanx(1)}$

⇒ $Tan(x-\frac{\pi }{4}) = \frac{\frac{7}{24} -1}{1+\frac{7}{24} }$

⇒ $Tan(x-\frac{\pi }{4}) = \frac{\frac{7-24}{24} }{\frac{7+24}{24} }$

⇒ $Tan(x-\frac{\pi }{4}) = \frac{-17}{24} (\frac{24}{31} )$

⇒ $Tan(x-\frac{\pi }{4}) = \frac{-17}{31}$

7 0

3 years ago

20 ounce sodas cost 4 for $5. How much does each soda cost?

dolphi86 [110]

I think 1.99?
I have no idea but I think it’s that

3 0

2 years ago