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3 years ago

10

A sixth-grade student bought three can of tennis balls for $4 each.Sales tax for all three can was $.95. Write an expression to

show the total amount the student paid.

1 answer:

ElenaW [278]3 years ago

4 0

Heisnzknsjds jsnsksidjdkdkdkdkd

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k is a an integer for which 1/2^1-k, 1/8. What is the value of k? 1/2^1-k must be equal to 1/8 if i read the question right.

svetlana [45]

Answer:

k = -2

Step-by-step explanation:

If $\frac12^{1-k}=\frac18$

Then

$\frac1{2^{1-k}}=\frac18=\frac1{2^3}$

So

$1-k = 3$

From this follows k = -2

3 0

3 years ago

What is the perimeter, P, of a rectangle that has a length of x + 5 and a width of y − 1?

Helen [10]

Answer:P=2x + 2y + 8

Step-by-step explanation: Perimeter (p) =2L+ 2w

P= 2(x+5)+2(y-1)

Remove bracket

P=2x+ 10 +2y - 2

P=2x+2y+8

6 0

3 years ago

Mary saw a bottle of shampoo that cost $7.75 and a bottle of conditioner that cost $5.90.

Marizza181 [45]

Answer:

$1.85

Step-by-step explanation:

$7.75 is $1.85 greater then $5.90

5 0

3 years ago

Read 2 more answers

(27.45-14.61)-[12.53-36.75] can someone simplify please?

viva [34]

Use order of operations PEMDAS

Here the parentheses are worked out first .

(27.45-14.61)-[12.53-36.75]

= (12.84) - (-24.22)

= 12.84 + 24.22

= 37.06 Answer

5 0

3 years ago

Solve the initial value problem <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bd%5E%7B2%7Dy%7D%7Bdx%5E%7B2%7D%7D%20%2B%202%20%5C

pogonyaev

The characteristic equation for this ODE is

$r^2+2r+5=0$

which has roots at $r=-1\pm2i$ , so the general solution is

$y_c=(C_1\cos2x+C_2\sin2x)e^{-x}$

Given $y(0)=2$ , we have

$2=(C_1\cos0+C_2\sin0)e^{-0}\implies C_1=2$

and $y'(0)=2$ , we have (upon differentiating $y_c$ )

${y_c}'=((2C_2-C_1)\cos2x-(2C_1+C_2)\sin2x)e^{-x}$
$2=((2C_2-2)\cos0-(4+C_2)\sin0)e^{-0}$
$2=2C_2-2\implies C_2=2$

So the particular solution is

$y_c=(2\cos2x+2\sin2x)e^{-x}$

3 0

2 years ago