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3 years ago

Help me please please !!

Mathematics

1 answer:

scoray [572]3 years ago

6 0

The probability of the student picked will be a junior is 27 percent.
there is a total of 30 kids. 8 are juniors. 8/30 = 0.266
move the decimal back two spaces for a percent. 26.6% is your precise answer. after rlunding it wpuld be 27 percent.

hope this helps

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Could u help me <br><br>with this

AleksandrR [38]

Answer:

P = 7

Step-by-step explanation:

46+8=54

54-5=49

49÷7=P

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3 years ago

A school supply store owner sold 9 book bags and earned $270.00

mamaluj [8]

The answer to this is D, $990.00

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Triangle ABC is located on a coordinate plane. Triangle ABC is transformed to create triangle A'B'C using the rule described bel

lara [203]

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What grade is this

Step-by-step explanation:

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3 years ago

Find y' by implicit differentiation √x +√y =1

AleksandrR [38]

Differentiate both sides with respect to x

$\frac{d}{dx}(x^{\frac{1}{2}} + y^{\frac{1}{2}}) = \frac{d}{dx}(1)\\\\ \frac{1}{2x^{\frac{1}{2}}} + \frac{1}{2y^{\frac{1}{2}}}\frac{dy}{dx} = 0\\\\\frac{1}{2y^{\frac{1}{2}}}\frac{dy}{dx} = -\frac{1}{2x^{\frac{1}{2}}}\\\\\frac{1}{2\sqrt{y}}\frac{dy}{dx} = -\frac{1}{2\sqrt{x}} \\\\\frac{dy}{dx} = -\frac{1}{2\sqrt{x}} \times 2\sqrt{y}\\\\\frac{dy}{dx} = -\frac{\sqrt{y}}{\sqrt{x}} \\\\\boxed{\bf{y'= -\frac{\sqrt{y}}{\sqrt{x}}}}$

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3 years ago

At a local coffee shop, three coffees and two muffins cost a total of $7.00. Two coffees and four

rewona [7]

Answer:

$10.25

Step-by-step explanation:

Set up a system of equations, so 3c + 2m = 7 and 2c + 4m = 8, where c = the cost of coffees, and m = cost of muffins

To solve multiply the first equation by -2(3c + 2m=7) so you get -6c -4m = -14 now add the two equations

-6c - 4m = -14

2c + 4m = 8 notice that -6c + 2c = -4c and -4m + 4m cancels, then -14+8=-6

so we have -4c = -6 so c = $1.50

To solve for m, substitute c = 1.50 so 3(1.50) + 2m = 7, so solve for m so

4.5 + 2m = 7, 2m = 2.5, so m = $1.25

So now solve the final problem 6(1.50) + 1(1.25) = $10.25

6 0

3 years ago