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2 years ago

10

I need help plz !!!!!!!!!!!!! i dont under stand

1 answer:

Vikki [24]2 years ago

7 0

Answer:

b

Step-by-step explanation:

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Maranda is buying pencils and a writing pad for her adult writing class. The writing pad she wants costs $3.50, and each pencil

Kruka [31]

Hello!

3.50 + 0.15 = 3.65

Because both items would cost $3.50 together, Maranda will be eligible to buy them both and stay within her budget of $5.00.

3 0

3 years ago

Complete the identity, sin(a+b)/cosacosb=

8090 [49]

Answer:

tana + tanb

Step-by-step explanation:

Using the trigonometric identities

• sin(a + b) = sinacosb + cosasinb

• tanx = $\frac{sinx}{cosx}$ , then

$\frac{sin(a+b)}{cosacosb}$

= $\frac{sinacosb+cosasinb}{cosacosb}$

= $\frac{sinacosb}{cosacosb}$ + $\frac{cosasinb}{cosacosb}$

= $\frac{sina}{cosa}$ + $\frac{sinb}{cosb}$

= tana + tanb

5 0

3 years ago

What is the answer to 46.25 divide by 5 - 2

Alchen [17]

First, we divide 46.25 by 5 which is 9.25. Subtract 2 from 9.25 and you have 7.25

7 0

3 years ago

Read 2 more answers

Solve the equation for x, in simplest form

Assoli18 [71]

Answer:

5/6

Step-by-step explanation:

5 0

3 years ago

There are 8 rows and 8 columns, or 64 squares

lawyer [7]

Complete Question:

There are 8 rows and 8 columns, or 64 squares on a chessboard.

Suppose you place 1 penny on Row 1 Column A,

2 pennies on Row 1 Column B,

4 pennies on Row 1 Column C, and so on …

Determine the number of pennies in Row 1

Determine the number of pennies on the entire chessboard?

Answer:

255 in the first row

18,446,744,073,709,551,615 in the entire board

Step-by-step explanation:

Given

$Rows = 8$

$Columns = 8$

Solving (a): Number of pennies in first row

The question is an illustration of geometric sequence which follows

$1,2,4....$

Where

$a =1$ --- The first term

Calculate the common ratio, r

$r = \frac{T_2}{T_1} = \frac{4}{2} = 2$

The number of pennies in the first row will be calculated using sum of n terms of a GP.

$S_n = \frac{a(r^n - 1)}{n - 1}$

Since, the first row has 8 columns, then

$n = 8$

Substitute 8 for n, 2 for r and 1 for a in $S_n = \frac{a(r^n - 1)}{r - 1}$

$S_8 = \frac{1 * (2^8 - 1)}{2 - 1}$

$S_8 = \frac{1 * (256 - 1)}{1}$

$S_8 = \frac{1 * 255}{1}$

$S_8 = 255$

Solving (b): The entire board has 64 cells.

So:

$n = 64$

Substitute 64 for n, 2 for r and 1 for a in $S_n = \frac{a(r^n - 1)}{r - 1}$

$S_{64} = \frac{1 * (2^{64} - 1)}{2 -1}$

$S_{64} = \frac{(2^{64} - 1)}{1}$

$S_{64} = \frac{(18,446,744,073,709,551,616 - 1)}{1}$

$S_{64} = \frac{18,446,744,073,709,551,615}{1}$

$S_{64} = 18,446,744,073,709,551,615$

5 0

3 years ago