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Degger [83]
3 years ago
12

I'LL GIVE BRAINLIEST PLEASE ANSWER ALL FOUR PLEASE

Mathematics
1 answer:
lesya [120]3 years ago
7 0

Answer:

Step-by-step explanation:

1.) 700*0.42 = 294. Out of the 700 people at the concert, 294 are tennagers.

2.) 1.07*$450 = $481.50, including sales tax (final price)

3.) 120/(100%-85%) = 120/0.15 = 800. Original amount of water is 800 ml (Check by 800mL*0.15, which equals 120 mL)

4.) 100-35-45 = 20%

250*20% = 50; Out of the 250 sandwiches, Josh made 50 ham sandwiches.

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Evaluate the following when $a = 3$, $b = \frac14$, and $c = 5$: \[ \frac{b^{-1}}{ca^{-1} - ac^{-1}}. \] Thank you so much!
pickupchik [31]

\dfrac{b^{-1}}{ca^{-1}-ac^{-1}}=\dfrac{\frac1b}{\frac ca-\frac ac}

Multiply the numerator and denominator by ac:

\dfrac{\frac1b}{\frac ca-\frac ac}\cdot\dfrac{ac}{ac}=\dfrac{\frac{ac}b}{c-a}

Since b=\frac14, we have b^{-1}=\frac1b=4. So substituting the values of <em>a</em>, <em>b</em>, and <em>c</em> gives us

\dfrac{\frac{ac}b}{c-a}=\dfrac{3\cdot5\cdot4}{5-3}=\dfrac{60}2=\boxed{30}

4 0
3 years ago
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What is x=g/b2-4ac/2a
Alexandra [31]

Hello there!

the answer is x= 2g/b-2a to the power 2 c

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3 years ago
2. 10+ 2 + 3 x 5 - 3​
Setler79 [48]
Your answer would be 24
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Expression for: 3 less than the quotient of a number y and 4
VashaNatasha [74]

Answer:

( x ÷ 4 ) - 3

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3 less than means minus 3 and the quotient of a number ( x ) and 4.

3 0
2 years ago
Roberto had $88, which is eleven times as much money as Bianca had. How
Shalnov [3]

The equation is 11x = 88. And Bianca had $8. Then the correct option is B.

<h3>What is Algebra?</h3>

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

Roberto had $88, which is eleven times as much money as Bianca had.

Then the amount of money Bianca had will be

Let Bianca's money be x.

Then we have

11x = $88

  x = $8

Then the correct option is B.

More about the Algebra link is given below.

brainly.com/question/953809

#SPJ1

7 0
2 years ago
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