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4 years ago

Help, please I need this till tomorrow :(

Mathematics

2 answers:

docker41 [41]4 years ago

6 0

Count the number of squares for each room. That is the area of each room. Add the area of all the rooms together to get the total area.

zaharov [31]4 years ago

3 0

To find the area of each room, you need to multiply the length and width together.

Music Room - 3x6 = 18 units²

Dance Room - 4x6 = 24 units²

Play Room - 3x7 = 21 units²

Living Room - 5x5 = 25 units²

Kitchen - 6x6 = 36 units²

Bedroom - 6x7 = 42 units²

Closet - 4x4 = 16 units²

Guest Room - 5x7 = 35 units²

Black (Empty) Space - 1x2 = 2 units²

18 + 24 + 21 +25 +36 +42 + 16 + 25 + 2 = 209 units²

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Dmitry_Shevchenko [17]

I believe it's b.

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3 years ago

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Solve 3x + k = cfor x.

Ghella [55]

First, subtract k from both sides. That means c - k is in the left side and 3x is on the right. Then, divide by 3 on both sides. So, the answer is x = (c - k) / 3.

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4 years ago

Ellie practices piano 2/3 h per day, several days each week. She practiced piano 32 2/3 hours during the summer. What equation c

SVEN [57.7K]

hello :)

so let me just give you the answer first:

2/3 * d = 32 2/3

here is why

so since the sentence said 2/3 PER day, then d (the number of days) multiplied by the time spent each day playing piano should give you how much time was spent in total over the certian number of days.

the 32 2/3 is just the amount of time ellie spent (as you have said)

so, this equation would be the correct one.

i hope this helped you out! please vote me for brainliest and have splendid day!

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4 years ago

You have a recipe that calls for 3 eggs for every 2 cups of flour. You use 12 eggs. How much flour do you need?

WINSTONCH [101]

You use 8 cups of flour

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3 years ago

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Math scores on the SAT exam are normally distributed with a mean of 514 and a standard deviation of 118. If a recent test-taker

LuckyWell [14K]

Answer:

Probability that the student scored between 455 and 573 on the exam is 0.38292.

Step-by-step explanation:

We are given that Math scores on the SAT exam are normally distributed with a mean of 514 and a standard deviation of 118.

Let X = Math scores on the SAT exam

So, X ~ Normal( $\mu=514,\sigma^{2} =118^{2}$ )

The z score probability distribution for normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = population mean score = 514

$\sigma$ = standard deviation = 118

Now, the probability that the student scored between 455 and 573 on the exam is given by = P(455 < X < 573)

P(455 < X < 573) = P(X < 573) - P(X $\leq$ 455)

P(X < 573) = P( $\frac{X-\mu}{\sigma}$ < $\frac{573-514}{118}$ ) = P(Z < 0.50) = 0.69146

P(X $\leq$ 2.9) = P( $\frac{X-\mu}{\sigma}$ $\leq$ $\frac{455-514}{118}$ ) = P(Z $\leq$ -0.50) = 1 - P(Z < 0.50)

= 1 - 0.69146 = 0.30854

The above probability is calculated by looking at the value of x = 0.50 in the z table which has an area of 0.69146.

Therefore, P(455 < X < 573) = 0.69146 - 0.30854 = 0.38292

Hence, probability that the student scored between 455 and 573 on the exam is 0.38292.

7 0

4 years ago