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3 years ago

15

Your job is to sort and sack marbles for sale. A bag contains 55 marbles, some red and some green. If there are 11 red marbles,

what is the ratio of red to green marbles?

2 answers:

Galina-37 [17]3 years ago

8 0

The ratio is 11:44 There are 11 red marbles and 55-11=44 which is the number of green marbles.

alekssr [168]3 years ago

4 0

Answer:

1:4

Step-by-step explanation:

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I don’t know how much she need to make

Ivanshal [37]

Answer:

4

Step-by-step explanation:

She can make 4. Have an amazing day

7 0

3 years ago

The regular price of a shirt is $15. Natalie bought it on sale for 0.9 times its regular price. Then the sale price was multipli

bezimeni [28]

Answer: $14.31

Step-by-step explanation:

Assuming it is the final price Natalie paid that you want:

Selling price = 0.9 * 15

= $13.50

To cater for tax it was then multiplied by 1.06:

= 13.5 * 1.06

= $14.31

6 0

3 years ago

Which statements about the hyperbola are true? Check all that apply. A. There is a focus at (0,−10). B. There is a focus at (0,

hichkok12 [17]

Answer:

A. There is a focus at (0,−10).

Step-by-step explanation:

Assume the hyperbola is like the one below.

The hyperbola is vertical and centred on the y-axis, so its general equation is

$\dfrac{y^{2}}{a^{2}} - \dfrac{x^{2}}{b^{2}} = 1$

The vertices of your parabola are (0,±8) so a = 8.

The covertices are (±6,0), so b = 6.

Calculate c

$\begin{array}{rcl}a^{2} + b^{2} & = & c^{2}\\8^{2} + 6^{2} & = & c^{2}\\64 + 36 & = & c^{2}\\100 & = & c^{2}\\c & = & \mathbf{10}\\\end{array}$

A. Foci

The foci are at (0, ±c) = (0, ±10)

TRUE. There is a focus at (0,-10).

B. Foci

The foci are at (0,±10).

False. There is no focus at (0,12)

C. and D. Asymptotes

The equations for the asymptotes are

$y = \pm\dfrac{a}{b}x = \pm\dfrac{8}{6}x = \pm\dfrac{4}{3}x$

So, y = ±x are not asymptotes.

False.

E. and F. Directrices

The equations of the directrices are

y = ±a²/c = ±64/10 = ±6.4

y = 6.4 is a directrix.

E is false. x = cannot be a directrix

F is uncertain. Your equation for the directrix is incomplete.

3 0

4 years ago

Steven purchased a bowl. the diameter of a bowl is 14cm. what is the circumference of bowl.

jasenka [17]

Try going through the formula which is 2 pi r
so 2*3.14*7

3 0

3 years ago

PLEASE HELP ME!!!!!!!!!! 57-4t >(their is an egual sign under the less then sign)13

Alexandra [31]

57 - 4t > = 13.....subtract 57 from both sides
-4t > = 13 - 57
-4t > = - 44 ...divide both sides by -4, and change the inequality sign
t < = -44 / -4
t < = 11

u solve inequalities much like u do equations except for one very important rule. In an inequality, if u divide/multiply by a negative number, u have to change the inequality sign.

8 0

3 years ago

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