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aliina [53]
2 years ago
5

Some can help me Plis......

Mathematics
1 answer:
inn [45]2 years ago
7 0
Solve for the value of Y using the first equation, 3x-7, and then plug in 3x-7 wherever you see Y, because Y=3x-7. You can find X and then use that value of X and plug it into the equation to solve for Y
You might be interested in
How do you find the ratio of a number?
Virty [35]
You don't find the ratio of one number.
You find the ratio of two numbers.
Their ratio is their quotient ... one number divided by the other one.
5 0
2 years ago
A large university is interested in the outcome of a course standardization process. They have taken a random sample of 100 stud
quester [9]

Answer:

Step-by-step explanation:

a)

Number of sample, n = 100

p = 0.78

q = 1 - p = 1 - 0.78

q = 0.22

For a confidence level of 90%, the corresponding z value is 1.645.

The formula for determining the error bound for the proportion is

z × √pq/n

= 1.645 ×√(0.78 × 0.22)/100

= 1.645 × 0.0414 = 0.068

The upper boundary of the population proportion is

0.78 + 0.068 = 0.85

The lower boundary of the population proportion is

0.78 - 0.068 = 0.71

b) For a confidence level of 95%, the corresponding z value is 1.96.

Therefore,

= 1.96 ×√(0.78 × 0.22)/100

= 1.96 × 0.0414 = 0.081

The upper boundary of the population proportion is

0.78 + 0.081 = 0.86

The lower boundary of the population proportion is

0.78 - 0.081 = 0.7

4 0
2 years ago
Delaney is saving money in an account that offers 9% simple interest. She deposits 2000 from her grandmother into the account an
Brrunno [24]

Answer:

15years

Step-by-step explanation:

Given data

Rate= 9%

Principal= $2000

Final amount= $4700

The simple interest formula is given as

A= P(1+rt)

Substitute

4700=2000(1+0.09*t)

4700= 2000+ 180t

4700-2000= 180t

2700=180t

t= 2700/180

t= 15 years

Hence the time is 15years

6 0
2 years ago
Need help pls help me
irina1246 [14]
i can’t see it can you take a better picture
7 0
3 years ago
Find the circumference of the object
ivolga24 [154]

Answer:

28.26

Step-by-step explanation:

circumference= 2πr or πd (diameter)

9 x 3.14=28.26

6 0
1 year ago
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