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Dahasolnce [82]

3 years ago

5

A box contains 5 plain pencils and 5 pens. A second box contains 5 color pencils and 7 crayons. One item from each box is chosen

at random

2 answers:

chubhunter [2.5K]3 years ago

6 0

Is there more because with out it we can’t understand what it means

bazaltina [42]3 years ago

6 0

Can you give more information on the question

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Find the area of the triangle below.<br> 15<br> 9

defon

Answer:

67.5

Step-by-step explanation:

If your triangle's base is 15, and your height is 9, then the area is 67.5

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3 years ago

Ax + By = -C solve for x

RoseWind [281]

Answer:

C=−Ax−By

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

3 0

2 years ago

Read 2 more answers

Help with this find the image of (1 ,2) after a reflection about y=x followed by a reflection about y=-x

natali 33 [55]

Answer:

(0,-3)

Step-by-step explanation:

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3 years ago

1) 3r² – 2r=-9<br> Quadratic formula

Nonamiya [84]

Answer:

Solving the equation $3r^2-2r=-9$ using quadratic formula we get: $\mathbf{ r=\frac{1+\sqrt{26}\:i}{3}\:or\: r=\frac{1-\sqrt{26}\:i}{3}}$

Step-by-step explanation:

We need to solve the equation $3r^2-2r=-9$ using quadratic formula.

The quadratic formula is: $r=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

For the given equation: $3r^2-2r=-9$

We can write it as: $3r^2-2r+9=0$

We have a = 3, b= -2 and c=9

Putting values in quadratic formula and finding value of r

$r=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\r=\frac{-(-2)\pm\sqrt{(-2)^2-4(3)(9)}}{2(3)}\\r=\frac{2\pm\sqrt{4-108}}{6}\\r=\frac{2\pm\sqrt{-104}}{6}\\We\:know\:that: \sqrt{-1}=i\\ r=\frac{2\pm\sqrt{26} \:i}{6}\\ r=\frac{2+2\sqrt{26}\:i}{6}\:or\: r=\frac{2-2\sqrt{26}\:i}{6}\\ r=\frac{2(1+\sqrt{26}\:i)}{6}\:or\: r=\frac{2(1-\sqrt{26}\:i)}{6}\\ r=\frac{1+\sqrt{26}\:i}{3}\:or\: r=\frac{1-\sqrt{26}\:i}{3}$

So, solving the equation $3r^2-2r=-9$ using quadratic formula we get: $\mathbf{ r=\frac{1+\sqrt{26}\:i}{3}\:or\: r=\frac{1-\sqrt{26}\:i}{3}}$

3 0

3 years ago

How will you find the number of beach chairs

Otrada [13]

I guess you have to count them?

6 0

3 years ago