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3 years ago

Students are auditioning for a school play. Only 18 of the 45 students

Mathematics

2 answers:

Svetllana [295]3 years ago

8 0

40%. 18/40=0.4 and then that converted to a percentage is 40%

o-na [289]3 years ago

6 0

It should be 40%, you convert 18/45 to a decimal then multiply by 100

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A store mixes Kentucky bluegrass worth $12 per pound and chewing fescue worth $16 per pound. The mixture is to sell for $15 per

SashulF [63]

Let the amount of Kentucky Bluegrass be k.
Let the amount of Chewing Fescue be c.
$12k+16c=15\times372$
k+c=372
c=372 - k
12k + 16(372 - k) = 15 * 372 = 5580
12k + 5952 - 16k = 5580
-4k = -372
k = 93 pounds
c = 372 - 93 = 279 pounds

5 0

4 years ago

Evaluate the expression 8 - 2x^2 when x = -3

jekas [21]

Answer:

-10

Step-by-step explanation:

8 - 2x^2 =

= 8 - 2(-3)^2

= 8 - 2(9)

= 8 - 18

= -10

8 0

4 years ago

Read 2 more answers

Brian invests £8200 into his bank account.

Svetradugi [14.3K]

Answer:

£9184

Step-by-step explanation:

Interest = PRT/100

P = Price

R = Rate

T = time

First Let's find the interest for 2 years

$interest = \frac{8200 \times 6 \times 2}{100} \\ = 984$

So, the interest is £984

Now let's find the full amount he received after two years ,

$8200 + 984 = 9184$

Total Amount = £9184

Hope this helps you

Let me know if you have any other questions :-):-)

6 0

3 years ago

Round 0.0851 to the nearest whole number

Nitella [24]

Answer:

Step-by-step explanation:

7 0

3 years ago

random sample has been taken from a normal population and two confidence intervals constructed using exactly the same data. The

Zepler [3.9K]

The sample mean of the random sample is 50

The margin of error (E) is the amount of error allowed in the random sample.

The confidence interval (CI) is given by:

CI = μ ± E = (μ - E, μ + E)

Given a confidence interval of (38.02, 61.98), hence:

μ - E = 38.02 (1)

μ + E = 61.98 (2)

Hence solving equations 1 and 2 simultaneously gives:

μ = 50, E = 11.98

Hence the sample mean of the random sample is 50

Find out more at: brainly.com/question/24131141

5 0

3 years ago