3 years ago

Tammy scored 88, 72, 44 points on her first three test. What must she score in her last test to get at least an average of 70?

Mathematics

1 answer:

lara [203]3 years ago

5 0

Answer:

Step-by-step explanation:

(88+72+44+x)/4=70

88+72+44+x=280

204+x=280

x=76

Therefore, Tammy needs to score a 76 on her last test to get at least an average of 70.

You might be interested in

I need the word for this definition..... a number is the product of that number and any whole number

Oxana [17]

The answer to that definition is a multiple. A multiple is any number that is not zero.

Hope I helped!

- Amber

4 0

3 years ago

Solve for x: 6x-4y=3

frutty [35]

Answer:

x = 1/2 + 2y/3

Hope this helps!

7 0

3 years ago

Read 2 more answers

Find the measure of

jok3333 [9.3K]

Answer:

119

Step-by-step explanation:

because if u see <EAC AND<BAD. are vertical so if u add 62°to 57° or adds up to 119

3 0

3 years ago

What is the unit rate and rate of 36 customers in 30 days

ruslelena [56]

36 customers/30 days = 1.2 customers per day

30 days / 36 customers = 5/6 day per customer

5 0

3 years ago

A student wants to estimate the mean score of all college students for a particular exam. First use the range rule of thumb to m

Wewaii [24]

Answer:

See explanation below

<u>Step-by-step explanation:</u>

range = 2200 - 300 = 1900

To find standard deviation, we have:

standard deviation = range/4 = $\frac{1900}{4}$ = 475

The range rule of thumb estimate for the standard deviation is 475

Given:

Standard deviation, $\sigma$ = 475

Margin of Error, ME = 100

$\alpha$ = 1 - 0.90 = 0.10

Za/2 = Z0.05 = 1.64

Find sample size, n:

n ≥ $[Z_\alpha_/_2 * (\frac{\sigma}{ME})]^2$

n ≥ $[1.64 * (\frac{475}{100})]^2$

n ≥ 60.68

≈ 61

Minimun sample size,n = 61

5 0

3 years ago