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3 years ago

LOTS of points due today!!!!! 8-10

Mathematics

1 answer:

Karolina [17]3 years ago

8 0

Answer:

they are 10 ppl in the crew

$12800×15/100=$1920

$10×100/80=$12.50

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Harold wrote this equation to model the level of water in a pool over time. The variable x represents time in hours. f(x) = 3,50

lina2011 [118]

Answer:

The water level is falling.

The initial level of water in the pool was 3,500 units

The water was 2,600 units high after 4 hours.

Step-by-step explanation:

The given function that models the water level is

$f(x)=3,500-225x$

where $x$ represents time in hours.

The function represents a straight line that has slope $m=-225$

Since the slope is negative, it means the water level is falling.

The initial level of water in the pool can found when we put $x=0$ into the function.

$f(0)=3,500-225(0)$

$f(0)=3,500$ , hence the initial level is 3,500.

To determine the level of water in the pool after 14 hours, we put $x=14$ into the equation to get;

$f(14)=3,500-225(14)$

$f(14)=3,500-3150$

$f(14)=350$

To determine the water level after 4 hours we put $x=4$

$f(4)=3,500-225(4)$

$f(4)=3,500-900$

$f(14)=2,600$

4 0

3 years ago

Read 2 more answers

Combining like terms with negative coefficients<br><br> −n+(−4)−(−4n)+6

Serjik [45]

Remember, if you add negative four, you're really subtracting four, or if you take away negative four, you're really adding four.

-n+(-4)-(-4n)+6
-n-4+4n+6 simplify
{-n+4n are like terms, so combine them. -n+4n is exactly the same as 4n-n, so flip them around if it helps. Just remember to keep the sign with the right number. Same thing with -4+6.}

Answer:

3n+2

8 0

3 years ago

Find the missing probability.<br> P(A) = 0.4; P(B) = 0.7; P(A or B)<br> ; P(A and B) = 0.3

solong [7]

Given:

$P(A)=0.4, P(B)=0.7, P(A\text{ and }B)=0.3$

To find:

The value of $P(A\text{ or }B)$ .

Solution:

We know that,

$P(A\text{ and }B)=P(A\cap B)$

$P(A\text{ or }B)=P(A\cup B)$

It means, we have $P(A)=0.4, P(B)=0.7, P(A\cap B)=0.3$ and we need to find the value of $P(A\cup B)$ .

$P(A\cup B)=P(A)+P(B)-P(A\cap B)$

$P(A\cup B)=0.4+0.7-0.3$

$P(A\cup B)=1.1-0.3$

$P(A\cup B)=0.8$

Therefore, the value of $P(A\text{ or }B)$ is 0.8.

4 0

3 years ago

Two dice are rolled. What is the probability of rolling a three on one and a four on the other? Express the answer as a reduced

Drupady [299]

$|\Omega|=6^2=36\\A=\{(3,4),(4,3)\}\\|A|=2\\\\P(A)=\dfrac{2}{36}=\dfrac{1}{18}$

6 0

2 years ago

Please help me in the question above

lina2011 [118]

The answer is C: Expression b and d

Expression A is used when you want to know how much $$ was taken off the original

Expression C won’t work at all because it’s like saying what is $1 subtract discount.

Expression B and D is saying original,P, subtract discount price=sales price

3 0

3 years ago