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2 years ago

There is a bag with only red marbles and blue marbles.

Mathematics

1 answer:

hram777 [196]2 years ago

7 0

Answer:

Step-by-step explanation:

The probability of choosing a blue marble is 7/8, or 49/56, which means that out of 56 marbles, 49 are blue. 56-49=7, so there are 7 red marbles. Hope this helps! :)

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The graphs below show four functions: Graph A shows function f of x equals 4 multiplied by 3 to the power of x. Graph B shows fu

s2008m [1.1K]

Answer:

Graph B shows function f of x equals 4 multiplied by 3 to the power of negative x.

Step-by-step explanation:

$f(x) = 4(3)^{-x}$ is the value 4 times three raised to the negative x. Graph B is the best representation.

5 0

3 years ago

Read 2 more answers

Solve for a<br>5+14a=9a-5 a=

poizon [28]

Answer:

-2

Step-by-step explanation:

5+14a=9a-5

+5 +5

10+14a=9a

-9a -9a

10+5a=0

-5a -5a

10= -5a

÷5 ÷5

2= -a

*-1 *-1

-2=a

4 0

3 years ago

Gustavo and yuki were asked to find an explicit formula for the sequence 19, 0, -19, -38...

KiRa [710]

Answer:

<h2>Neither Gustavo nor Yuki</h2>

Step-by-step explanation:

It's an arithmetic sequence.

$0-19=-19\\-19-0=-19\\-38-(-19)=-38+19=-19$

The difference is constant.

The explicit formula of an arithmetic sequence:

$a_n=a_1+(n-1)d$

Substitute:

$a_1=19,\ d=-19$

$a_n=19+(n-1)(-19)$ <em>use distributive property</em>

$a_n=19-19n+19\\\\a_n=(19+19)-19n\\\\a_n=38-19n$

4 0

2 years ago

Liz wants to buy her favorite musical group’s new CD. The CD costs $15.24, including tax. Liz gives the store clerk a twenty-dol

Mila [183]

$20.00 - $15.24 = $4.76 in change. I'd say review decimal subtraction which you should have learned in fourth or fifth grade. Hope this helps!

3 0

3 years ago

How do you do 56 through 58? Thanks to anyone who awnsers!

astraxan [27]

Hello !

56)

$5 {x}^{2} + 8x = - 1 \\ 5 {x}^{2} + 8x + 1 = 0$

$\Delta = {b}^{2} - 4ac \\ = {8}^{2} - 4 \times 5 \times 1 \\ = 64 - 20 \\ = 44$

The value of the discriminant is 44.

57) ∆>0 : there are two solutions.

58)

$x_1 = \frac{ - b + \sqrt{\Delta} }{2a} \\ = \frac{ - 8 + \sqrt{44} }{2 \times 5} \\ = \frac{ \sqrt{11} - 4 }{5}$

$x_2 = \frac{ - b - \sqrt{\Delta} }{2a} \\ = \frac{ - 8 - \sqrt{44} }{2 \times 5} \\ = \frac{ - \sqrt{11} - 4 }{5}$

Have a nice day

4 0

1 year ago

Read 2 more answers