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3 years ago

You have $25 , then you babysat this week and earned $13.50. Then you spend $2.68 on a bag of chips . how much do you have left?

Mathematics

1 answer:

deff fn [24]3 years ago

8 0

So first you would have to add $25+$13.50=38.5 then subtract 38.5-2.68=35.82

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erma4kov [3.2K]

Hello again!

Answer is 60%

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so, for this one you first figure out how many study French.

2/9 of 270 is 60 (simple method: 1/9 is 270 divided by 9, which is 30. So 2/9 is 1/9 multiplied by 2, which is 60).
60 are doing French.

Then use this in the ratio of French to Spanish (3:7) and you have 3 and 60 on the same side. You have to multiply 3 by 20 to get to 60 (or divide 60 by 20 to get 3).
So the number you use to do the same to the other side of the ratio is 20.

7 multiplied by 20 (or 7 multiplied by 10, then multiply that by 2) to get 140.
140 are doing Spanish.

Then take the French and Spanish from the big total and you get 270-140-60=70
70 are doing German.

Of these 70, 42 are boys. 70-42 gives 28 girls. 42/70 is the fraction of boys doing German. This is the same as 6/10 and to get a percentage you multiply the fraction by 10 so that the bottom of it is out of 100 (so that’s 60/100).

And 60/100 is the same as 60%.

So your answer is 60%

6 0

3 years ago

Differentiate with respect to x:y= sinh^-1(x^2+1)

Aleks [24]

Answer:

The first derivative of $y = \sinh^{-1} (x^{2}+1)$ is $y' = \frac{2\cdot x}{\sqrt{x^{2}+2\cdot x +2}}$ .

Step-by-step explanation:

We proceed to find the first derivative of $y = \sinh^{-1} (x^{2}+1)$ by explicit differentiation and rule of chain:

$y = \sinh^{-1} (x^{2}+1)$

$y' = \frac{2\cdot x}{\sqrt{(x^{2}+1)^{2}+1}}$

$y' = \frac{2\cdot x}{\sqrt{x^{2}+2\cdot x +2}}$

The first derivative of $y = \sinh^{-1} (x^{2}+1)$ is $y' = \frac{2\cdot x}{\sqrt{x^{2}+2\cdot x +2}}$ .

8 0

3 years ago

Plz fast solve it and It should be right

ohaa [14]

9514 1404 393

Answer:

(i) ∠CDF = 86°

(ii) ∠BAD = 141°

Step-by-step explanation:

(i) Angles CDF and GFD are "alternate interior" angles, so are congruent.

∠CDF = 86°

(ii) Angles BAD and CDA are "alternate interior angles, so are congruent. Angle CDA is the sum of angles CDH and HDA. Angle CDH is supplementary to angle CDF, so is ...

∠CDH = 180° -∠CDF = 180° -86° = 94°

Then ...

∠CDA = ∠CDH +∠HDA = 94° +47°

∠CDA = 141°

5 0

3 years ago

What is 43 x 264 ....

White raven [17]

Answer:

43 x 264

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Def is a right triangle

zlopas [31]

if indeed DEF is a right-triangle, then we can apply the pythagorean theorem and the hypotenuse is really the square root of the sum of the square of the other two, if however the hypotenuse doesn't equal that, then is not,

$\bf \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies c=\sqrt{a^2+b^2} \qquad \begin{cases} c=\stackrel{hypotenuse}{42}\\ a=\stackrel{adjacent}{26}\\ b=\stackrel{opposite}{23}\\ \end{cases} \\\\\\ 42=\sqrt{26^2+23^2}\implies 42=\sqrt{676+529} \\\\\\ 42=\sqrt{1205}\implies 42\ne 34.7~~\bigotimes$

5 0

4 years ago

Read 2 more answers