3. Evaluate the expression 18
7+2 - 4
a. 2
b. 1.4
c. 6
d. 18

Answer:C

Step-by-step explanation:

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[tex]18 {c}^{3} - 50c = 0 [/tex]

[tex]2c(9 {c}^{2} - 25) = 0 [/tex]

[tex]2c(3c + 5)(3c - 5) = 0[/tex]

_________________________________

[tex]2c = 0[/tex]

[tex]c = 0[/tex]

_________________________________

[tex]3c + 5 = 0[/tex]

[tex]c = - \frac{5}{3} \\ [/tex]

_________________________________

[tex]3c - 5 = 0[/tex]

[tex]c = \frac{5}{3} \\ [/tex]

Done...

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The only zero of the equation 0=18c³−50c is c = 0, as it makes the equation true when substituted.

value is a zero of the equation 0 = 18c³ - 50c,

putting in the value for c

If c = 0:

0 = 18(0)³ - 50(0)

0 = 0 - 0

0 = 0 (True)

If c = 2:

0 = 18(2)³ - 50(2)

0 = 18(8) - 100

0 = 144 - 100

0 = 44 (False)

If c = -1:

0 = 18(-1)³ - 50(-1)

0 = 18(-1) + 50

0 = -18 + 50

0 = 32 (False)

only c = 0 is a zero of the equation 0 = 18c³ - 50c.

The equation 0 = 18c³ - 50c has only one zero, which is c = 0, as it satisfies the equation when substituted.

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Answer:

43/2

Step-by-step explanation:

Evaluate 12 - (3 y)/2 + y (2 y - 4/y) where y = 3:

12 - 3 y/2 + y (2 y - 4/y) = 12 - 3×3/2 + 3 (2×3 - 4/3)

Hint: | Express -3×3/2 as a single fraction.

-3×3/2 = (-3×3)/2:

12 + (-3×3)/2 + 3 (2×3 - 4/3)

Hint: | Multiply 2 and 3 together.

2×3 = 6:

12 - (3×3)/2 + 3 (6 - 4/3)

Hint: | Multiply -3 and 3 together.

-3×3 = -9:

12 + (-9)/2 + 3 (6 - 4/3)

Hint: | Put the fractions in 6 - 4/3 over a common denominator.

Put 6 - 4/3 over the common denominator 3. 6 - 4/3 = (3×6)/3 - 4/3:

12 - 9/2 + 3 (3×6)/3 - 4/3

Hint: | Multiply 3 and 6 together.

3×6 = 18:

12 - 9/2 + 3 (18/3 - 4/3)

Hint: | Subtract the fractions over a common denominator to a single fraction.

18/3 - 4/3 = (18 - 4)/3:

12 - 9/2 + 3 (18 - 4)/3

Hint: | Subtract 4 from 18.

| 1 | 8

- | | 4

| 1 | 4:

12 - 9/2 + 3×14/3

Hint: | Express 3×14/3 as a single fraction.

3×14/3 = (3×14)/3:

12 - 9/2 + (3×14)/3

Hint: | Cancel common terms in the numerator and denominator of (3×14)/3.

(3×14)/3 = 3/3×14 = 14:

12 - 9/2 + 14

Hint: | Put the fractions in 12 - 9/2 + 14 over a common denominator.

Put 12 - 9/2 + 14 over the common denominator 2. 12 - 9/2 + 14 = (2×12)/2 - 9/2 + (2×14)/2:

(2×12)/2 - 9/2 + (2×14)/2

Hint: | Multiply 2 and 12 together.

2×12 = 24:

24/2 - 9/2 + (2×14)/2

Hint: | Multiply 2 and 14 together.

2×14 = 28:

24/2 - 9/2 + 28/2

Hint: | Add the fractions over a common denominator to a single fraction.

24/2 - 9/2 + 28/2 = (24 - 9 + 28)/2:

(24 - 9 + 28)/2

Hint: | Evaluate 24 + 28 using long addition.

| 1 |  

| 2 | 8

+ | 2 | 4

| 5 | 2:

(52 - 9)/2

Hint: | Subtract 9 from 52.

| 4 | 12

| 5 | 2

- | | 9

| 4 | 3:

Answer: 43/2

Answer:

7/25

Step-by-step explanation:

the answer is 7/25

because 7/10 x 2/5 =7/25

Answer:

a

Step-by-step explanation:

Answer:

the slope m=11

Step-by-step explanation:

(To find the slope use the equation m=[tex]\frac{y2-y1}{x2-x1}[/tex])

(16,3), where 16=x1 and 3=y1

(14,-19), where 14=x2 and -19=y2

m=[tex]\frac{y2-y1}{x2-x1}[/tex]

=[tex]\frac{-19-3}{14-16}[/tex]

=[tex]\frac{-22}{-2}[/tex]

(simplify)

=11

Answer:

3,   2.5,   2.4,   2

Step-by-step explanation:

Answer:

|-3|,|-2.5|,|-2.4|,|-2|

Step-by-step explanation:

Treat them as if they were all positive numbers .

Answer:

The weight of the displaced water is the weight of the body

Step-by-step explanation:

In situations like this, the volume of the displaced water is not important.

However, it should be noted that when a body is immersed (fully or partially) in a liquid, the weight of the displaced liquid is equal to the weight of the body immersed in the liquid.

Since the weight of the body is not given, I'll conclude that the displaced water has the same weight as the body floating on the water.

Answer:

y=-4

Explanation:

you have to use the equation y₂-y₁/x₂-x₁ and what ever answer you get from this equation will be your slope

Answer:

It costs $42.43

Step-by-step explanation:

Answer:

$1.35

Step-by-step explanation:

7.5÷ 5/6=0.25

0.25x4 7/5=1.35

Answer:

3a*5 = (age of man) +2

Step-by-step explanation:

Answer:

16 < 30

Step-by-step explanation:

Substitute 22 for b, add 22 to 8 (30)

The inequality is correct, 30 is greater than 16

Answer:

m = 139167 / 329 = 423 / 1 = 423

Step-by-step explanation:

\displaystyle\int_{-\infty}^\infty e^{-x^2}dx = \sqrt{\pi}

\displaystyle \sum_{n} \frac{1}{n^s} = \prod_{p} {\frac{1}{1 - \frac{1}{p^s}}}

\displaystyle n! = \int_{0}^{\infty} {x^n e^{-x} \,dx}

F(n) = \frac{(\varphi)^n - (-\frac{1}{\varphi})^n}{\sqrt{5}}

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Answer:

So the second one is 3

The first one is 3

Step-by-step explanation:

You just divide the first one 4.02/1.34

The second one

1) 2x-5=1

2) add  5 on to both sides= 6

3) divide 2 by 6 = 3

Answer:

2:5

Step-by-step explanation:

There are 2 cups of milk and 5 cups of flour per recipe.

Answer:

2:5 or 2 to 5 or 2/5

Step-by-step explanation:

You have to put the number of milk first then flour.hope this helps:)

Answer: 5:2

Step-by-step explanation:

Answer: 4x + 8z + 6

Step-by-step explanation: 8x + (-4x) = 4x , 5z + 3z = 8z. 4x + 8z + 6

Answer:

I think its two

Step-by-step explanation:

Answer:

B.

Step-by-step explanation:

I'm not sure how to answer the 2. question

Answer:

The probability that exactly three of four randomly selected students that do not prefer water is; P=125/1296= 0.096

Step-by-step explanation:

Hope this helps

The required probability that exactly 3 of 4 randomly selected students do not prefer water is 0.096.

Given that,
Students at Freeman Middle School have a choice of water milk or juice for breakfast.
From a survey, it was determined that 50 students prefer water 100 prefer juice, and 150 prefer milk.

Probability can be defined as the ratio of favorable outcomes to the total number of events.

the probability that selected students to prefer water.
Total sample space = 300
Total desired events = 50
Pw = 50 / 300 = 1/6

the probability that selected students do not prefer water
Total sample space  = 300
Total desired events = 100+150 = 250

Pmj = (250)/300
     = 5/6

The probability for exactly 3 of 4 randomly selected students do not prefer water can be given as,

Preq =  Pmj.Pmj.Pmj.Pw

Preq = (5/6)^3 × 1/6

Preq= 125/1296
  = 0.096

Thus, the required probability that exactly 3 of 4 randomly selected students do not prefer water is 0.096.

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Answer:

The cost of one pound of bananas is $0.84.

Answer:

8.2

Step-by-step explanation:

Sorry man, A bit late : l but here it is anyways...

12.5g of kool-aid power can make 5 liters of juice.

20.5g liters of juice can make ? liters of juice.

Think of it as a ratio!

12.5:5 and 20.5:?

what times what equals to what?

12.5/2.5=5 SO, you do 20.5/2.5= 8.2

That's your answer! Hope you get it right!

Answer:

51.25 grams

Step-by-step explanation:

Alright so, in this question you need to figure out what is the amount for 1 liter. We can figure this out by doing 12.5 ÷ 5.

That equals to 2.5 grams. Great, now we have figured out the amount for 1 liter. The next step is pretty self explanatory. We multiple 2.5 grams x 20.5 and that equals to 51.25 grams needed.

Mathamatical explanation:

12.5g ÷ 5L

= 2.5g

2.5g x 20.5L

= 51.25grams

I really hoped this helped you guys.

Answer:

x = 11

Step-by-step explanation:

f(x) = -x + 7

f(x) = -4

Using substitution, -x + 7 = -4

Then you can solve from there

-x + 7 = -4

-x = -11

x = 11

Hope this helps!

(I apologize if I'm incorrect)

Answer:

$440

Step-by-step explanation:

You need to divide 660 by 3 to find the price of one, which is $220, then you need to multiply that number by 2 to get the price of two, which is $440.

I hope this helps!!!

Answer:

graph c represent a function

Step-by-step explanation:

if you do the line test the line will not hot any other points  excpet one

Answer:

PART ONE- 8/50 PART 2-38/50

Step-by-step explanation:

First of all, we know that there are 50 states. Lets see how many states begins with M first.

Maine‎ (27 C, 5 P)

Maryland‎ (28 C, 5 P)

Massachusetts‎ (29 C, 4 P)

Michigan‎ (28 C, 4 P)

Minnesota‎ (28 C, 2 P)

Mississippi‎ (27 C, 6 P)

Missouri‎ (25 C, 3 P)

Montana‎ (27 C, 6 P)

There are 8 states which means that the probabilty is 8/50 which simplifies to 4/25

We know that 12 states begins with a vowel. 50-12 is 38/50

The probability that it begins with M is 0.16 and the probability that it doesn't begin with a vowel is 0.76

Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur.

Given that, Selecting a State, Choose one of the 50 states at random.

We know that, P(A) = n(A)/n(S)

where, P(A) is the probability of an event “A” n(A) is the number of favourable outcomes. n(S) is the total number of events in the sample space.

a) There are 8 states which begins with M, that means the probability = 8/50 = 4/25 = 0.16

b) We know that 12 states begins with a vowel,

Therefore, the probability that it doesn't begin with a vowel = 1 - 12/50 = 38/50 = 0.76

Hence, The probability that it begins with M is 0.16 and the probability that it doesn't begin with a vowel is 0.76

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Answer:

4 is a factor of 20 but not a multiple of 10

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Answer:

A?

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Its one only one with 3v2 since you do 3v * v