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RUDIKE [14]
3 years ago
7

Toss a coin 7 times. what is the number of sequences of heads or tails?

Mathematics
1 answer:
dezoksy [38]3 years ago
5 0
2 to 7 or 2/7 or 2:7
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Write an expression to model the perimeter of the rectangle. Length is x-9 and width is 3x-4. Part b The perimeter of the rectan
koban [17]

Step-by-step explanation:

To find the perimeter of something, we add all of the measurements of the sides together.

A rectangle has 4 sides, this means we must double the algebraic hints given to us.

If we add them all up together it will look like this:

x-9+x-9+3x-4+3x-4=138

If we simplify it by collecting the like terms:

8x-26=138

We add 26 onto 138

8x=164

To find out what x equals, we divide by 8:

164÷8= 20.5

Answer:

x=20.5cm

x-9 is 11.5

3x-4 is 57.5

I know that you will not give 100 points but just wanted to help.

5 0
3 years ago
Read 2 more answers
The graph of y = 1 x is vertically stretched by a factor of 3, reflected across the y-axis and shifted to the left by 2 units. Wh
galben [10]

y = 3(-x - 2)

Any horizontal transformations or reflections you make to y = x must be within the parentheses.

8 0
3 years ago
What is the solution to the system of equations graphed below
Morgarella [4.7K]
Equation 1 ==> y = -4x + 2
Equation 2 ==> y = x - 3

Substitude equation 2 into 1

x - 3 = -4x + 2
-5 = -5x
x = 1

Substitude x into equation 2

y = 1 - 3
y = -2

Coordinates is (1, -2)
Answer is D.
3 0
3 years ago
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What step do u preform first when evaluating the expression 3 + (18 - 6) + 20 divided by 4
Elena L [17]

Answer:

Step-by-step explanation:

=3+(18-6)+20÷4

=3+12+20÷4

=3+12+5

=20

use BODMAS rule (Bracket of Division, Multiplication, Addition, and Subtraction)

5 0
2 years ago
Read 2 more answers
What is the sum of the first five terms of a geometric series with a1 =20 and r =1/4?
drek231 [11]
The sum of the first n terms in a geometric sequence given the first term (a1) and the common ratio (r) is calculated through the equation,

                            <span>Sn </span>= (<span><span><span>a1</span>(1−<span>r^n</span>) / (</span><span>1−r)

Substituting the known terms,
                           Sn = (20)(1 - (1/4)^4)) / (1 - 1/4)
                           Sn = 26.5625

Thus, the sum of the first four terms is 26.5625. </span></span>
5 0
3 years ago
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