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borishaifa [10]
3 years ago
7

Which of these sequences are arithmetic? Check all that apply.

Mathematics
1 answer:
kipiarov [429]3 years ago
5 0
I know that the second one the fourth one and the fifth one are arithmetic but I’m not sure about the others I think there are only three but don’t count me on it
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on a blueprint, the area of a tennis court is 16.25cm². a) if the scale on the blueprint is 1cm: 4m, what is the actual area of
Mars2501 [29]

Step-by-step explanation:

so,

1cm : 4m

that means the factor is 1/400 (as 1 m = 100 cm).

also to remember : 1 m² = 100cm×100cm = 10,000 cm²

the area of a rectangle is

length × width

if both dimensions are shortened by a factor (1/400) in our case :

length×1/400 × width×1/400 =

= length × width × 1/400² = length × width × 1/160,000

that means the area of the actual tennis court is

160,000 times the area of the blueprint picture :

160,000 × 16.25 = 2,600,000 cm² = 260 m²

we now know that the actual length of the tennis court is 400 times the length of the blueprint length :

400 × 6.25 = 2,500 cm = 25 m

7 0
3 years ago
At Pam's Beading Boutique, 22% of the 1,850 beads on clearance are plastic. How many plastic beads are there on clearance?
Leviafan [203]
1850 x 0.22 (decimal form of 22%) = 407. 407 plastic beads are on clearance.
5 0
3 years ago
How many solutions can be found for the equation 4x=4x
zlopas [31]

Answer:

infinite solutions

Step-by-step explanation:

4x=4x

Divide each side by x

4x/x = 4x/x

4 =4

This is always true,no matter what value we put in for x. So there are infinitely many solutions to the equation.

8 0
3 years ago
Read 2 more answers
-5x + 3y = 11 and x - 2y = 2 How would I solve by substitution?
Aleksandr-060686 [28]

Answer:

x=-4,y=-3

Step-by-step explanation:

8 0
3 years ago
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Consider an unreliable communication channel that can successfully send a message with probability 1/2, or otherwise, the messag
Anon25 [30]

Answer:

6 times we need to transmit the message over this unreliable channel so that with probability 63/64.

Step-by-step explanation:

Consider the provided information.

Let x is the number of times massage received.

It is given that the probability of successfully is 1/2.

Thus p = 1/2 and q = 1/2

We want the number of times do we need to transmit the message over this unreliable channel so that with probability 63/64 the message is received at least once.

According to the binomial distribution:

P(X=x)=\frac{n!}{r!(n-r)!}p^rq^{n-r}

We want message is received at least once. This can be written as:

P(X\geq 1)=1-P(x=0)

The probability of at least once is given as 63/64 we need to find the number of times we need to send the massage.

\frac{63}{64}=1-\frac{n!}{0!(n-0)!}\frac{1}{2}^0\frac{1}{2}^{n-0}

\frac{63}{64}=1-\frac{n!}{n!}\frac{1}{2}^{n}

\frac{63}{64}=1-\frac{1}{2}^{n}

\frac{1}{2}^{n}=1-\frac{63}{64}

\frac{1}{2}^{n}=\frac{1}{64}

By comparing the value number we find that the value of n should be 6.

Hence, 6 times we need to transmit the message over this unreliable channel so that with probability 63/64.

7 0
3 years ago
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