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3 years ago

if there’s 12 girls selling cookies that are 2.75 and they need to reach $360 how many boxes would each girl have to sell

Mathematics

1 answer:

Sindrei [870]3 years ago

4 0

Answer:

11 each

Step-by-step explanation:

360/2.75=130.9

rounding up, 131x2.75=360.25

131/12=10.9 boxes each

therefore each girl will have to sell 11 boxes

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The two-way table shows the distribution of book style to genre. Miguel claims that given that the book is paperback (PB) does n

Grace [21]

Answer:

Yes, the two events are independent because P(NF|PB)=P(NF).

Step-by-step explanation:

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3 years ago

A right triangle has an area of 50 square inches. If the triangle is an isosceles triangle, what are the lengths of the legs of

Fed [463]

<span>If this is an isosceles triangle, then it has two 45 degree angles corresponding to two legs of equal length. Orient the base of this triangle so that it's horizontal, and represent its length by b. Let h represent the height of the triangle. Then the area of this right triangle is 50 square inches = (1/2)(b)(h), or A = (b/2)h = 50 in^2.

Due to the 45 degree angles, the height of this triangle is equal to half the base, or h = b/2. Thus, (b/2)h = 50 becomes (b/2)(b/2) = 50, or b^2=200. Thus, b = 10sqrt(2), and h=(1/2)(10 sqrt(2)), or h = 5sqrt(2).

The length of one of the legs is the sqrt of [5sqrt(2)]^2+[5sqrt(2)]^2, or

sqrt(25(2)+25(2)) = sqrt(100) = 10.

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4 0

3 years ago

X^2 + bx + 49 is a perfect squad trinomial what is one possible value of b?

ddd [48]

a perfect square trinomial, (x + y)² = x² + 2xy + y²

so, if we have the x of the bx, what is left is the b

the expression would have to be (x + 7)², since we have the 49 and the x²

so, what's left: x² + 14x + 49,

b = 14

<em>hope it helps :)</em>

7 0

3 years ago

Match the following items by evaluating the expression for x = -2.

Sloan [31]

Answer:

1) $-4$

2) $-3$

3) $1$

4) $-2$

5) $4$

Step-by-step explanation:

According to the information given in the exercise, the value of "x" is:

$x = -2$

Then:

1) You must substitute $x = -2$ into the expresion $x-2$ :

$=(-2)-2$

Now, you must evaluate:

$=-4$

2) You have to substitute the given value of "x" into the second expression:

$x-1=(-2)-1$

Finally, evaluating, you get the following result:

$=-3$

3) According to the Zero exponent Rule, any non-zero number with an exponent of zero is equal to 1.

Then, substituting $x = -2$ into the expression $x^0$ and then evaluating, you get:

$x^0=(-2)^0=1$

4) By definition:

$a^1=a$

Then, substituting $x = -2$ into $x^1$ and evaluating, you get:

$x^1=(-2)^1=-2$

5) Since:

$a^2=a*a$

When you substitute the given value of "x" into the last expression and then you evaluate, you get:

$x^2=(-2)^2=(-2)(-2)=4$

4 0

3 years ago

What is the slope of the line that contains the point (-1,8) and (5,-4) answer.com?

pshichka [43]

THE SLOPE IS -2

if we have the coordinates of two points on a line, we can find the slope with this formula:
$s = \frac{y2 - y1}{x2 -x1} = \frac{y1 - y2}{x1 - x2}$
so the slope is
$\frac{8 - ( - 4)}{ - 1 - 5} = \frac{12}{ - 6} = - 2$
the answer is -2

good luck

5 0

3 years ago