All categories

4 years ago

If you could help ill mark brainlyess and it's worth 10 points

Mathematics

2 answers:

Svetach [21]4 years ago

8 0

The answer is 175 centimeters squared

KIM [24]4 years ago

8 0

7*7=49
1/2(9*7)=18
18*4=72
72+49=121
Answer total=122cm^2
Hope it helps.

You might be interested in

A scientist claims that 7% 7 % of viruses are airborne. If the scientist is accurate, what is the probability that the proportio

Reptile [31]

Answer:

The probability is $P(|p-\^{p}| > 0.03) = 0.0040$

Step-by-step explanation:

From the question we are told that

The population proportion is $p = 0.07$

The mean of the sampling distribution is $\mu_p = 0.07$

The sample size is n = 600

Generally the standard deviation is mathematically represented as

$\sigma_p = \sqrt{\frac{p (1 -p)}{n} }$

=> $\sigma_p = \sqrt{\frac{0.07(1 -0.07)}{600} }$

=> $\sigma_p = 0.010416$

Generally the probability that the proportion of airborne viruses in a sample of 600 viruses would differ from the population proportion by greater than 3% is mathematically represented as

$P(|p-\^{p}| > 0.03) = 1 - P(|p -\^{p}| \le 0.03)$

=> $P(|p-\^{p}| > 0.03) = 1 - P(-0.03 \le p -\^{p} \le 0.03 )$

Now add p to both side of the inequality

=> $P(|p-\^{p}| > 0.03) = 1 - P( 0.07-0.03 \le \^{p} \le 0.03+ 0.07 )$

=> $P(|p-\^{p}| > 0.03) = 1 - P(0.04 \le \^{p} \le 0.10 )$

Now converting the probabilities to their respective standardized score

=> $P(|p-\^{p}| > 0.03) = 1 - P(\frac{0.04 - 0.07}{0.010416} \le Z \le \frac{0.10 -0.07}{0.010416} )$

=> $P(|p-\^{p}| > 0.03) = 1 - P(-2.88 \le Z \le 2.88 )$

=> $P(|p-\^{p}| > 0.03) = 1 - [P(Z \le 2.88) - P(Z \le -2.88)]$

From the z-table

$P(Z \le 2.88) = 0.9980$

and

$P(Z \le -2.88) = 0.0020$

$P(|p-\^{p}| > 0.03) = 1 - [0.9980 - 0.0020]$

=> $P(|p-\^{p}| > 0.03) = 0.0040$

7 0

3 years ago

What are all the possible 3 digit number combinations 0-9?

Arada [10]

That would be 10 x 10 x 10 = 1000

7 0

4 years ago

Age 1:

Evgen [1.6K]

Answer:

The cost of one brownie is $0.75

Step-by-step explanation:

The given parameters are;

The number of pizza's Marcel bought = 4 pieces

The number of brownies Marcel bought = 2 brownies

The amount Marcel paid = $18.50

The number of pizza's Morgan bought = 3 pieces

The number of brownies Morgan bought = 2 brownies

The amount Morgan paid = $14.25

Let x represent the cost of a pizza and y represent the cost of a brownie, we have;

4·x + 2·y = $18.50...(1)

3·x + 2·y = $14.25...(2)

Subtracting equation (1) from equation (2) gives;

4·x + 2·y - (3·x + 2·y) = $18.50 - $14.25 = $4.25

4·x - 3·x + 2·y - 2·y = $4.25

x = $4.25

The cost of a pizza = x = $4.25

4·x + 2·y = $18.50

2·y = $18.50 - 4·x = $18.50 - 4×$4.25 = $1.5

y = $1.5/2 = $0.75

y = $0.75

The cost of a brownie = $0.75

3 0

3 years ago

1) 2m + 3m2 - 4m

Lilit [14]

Answer:

1) 2m + 3m2 - 4m=7

7) 3m2 – 2m + 4m= 11

8) 20 + 109 + 39 - 4= 164

3) 2m + 4m - 3m2= -3

9) 4xy + x + 2xy= 0

4) 2y + 14x - 7x + 9y= 18

10) 6m2 - 6m - 9m2= -51

Step-by-step explanation:

5 0

4 years ago

Valerie's employer covers 80% of the cost of a $4700per year health insurance plan , and Valerie's share of the cost of the plan

igor_vitrenko [27]

78.33 APEX.....................................................

8 0

3 years ago

Read 2 more answers