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3 years ago

Hh i know how to do this but i need help doing so-

Mathematics

2 answers:

lions [1.4K]3 years ago

6 0

Answer:

Step-by-step explanation

So you need the fraction to equal 2.4 and you don't know the numerator. 5 times 2.4 equals 12 so the numerator has to equal 12 so the answer is c

weeeeeb [17]3 years ago

5 0

Answer:

x = 4

Step-by-step explanation:

Undo what is done to the variable, in reverse order. The variable is multiplied by 3/5 and 0.5 is subtracted from the result.

To undo those operations, first you undo the subtraction by adding 0.5 to both sides of the equation. This gives you ...

3x/5 = 2.4

To undo the multiplication by 3/5, you can multiply by the inverse of that value, 5/3. Multiplying both sides of the equation by 5/3 gives ...

x = (5/3)(2.4) = 12/3

x = 4

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Let a= x^2 +4. Rewrite the following equation in terms of a and set it equal to zero.

dusya [7]

Answer:

If:

$a=x^{2}+4$ (1)

And we have to rewrite the following expresion in terms of $a$ :

${(x^{2}+4)}^{2}+32=12x^{2}+48$ (2)

Firstly we have to rearrange the right side of equation (2) in terms of $x^{2}+4$ , factorizing by the common factor:

${(x^{2}+4)}^{2}+32=12(x^{2}+4)$

Then, we can substitute $x^{2}+4$ by $a$ :

$a^{2}+32=12a$

And set it equal to zero:

$a^{2}-12a+32=0$ >>>>This is the resulting equation

Now, each term of an algebraic expresion (like the equation above) is composed of sign, coefficient, variable and exponent. The terms are separated from each other by the plus sign (+) or the minus sign (-).

In this case, the variable is $a$ and the number that multiplies the variable (the coefficient) is $-12$ , whereas the constant (which is the term with no variable) is $32$

6 0

3 years ago

Read 2 more answers

Selec the correct answer.

sp2606 [1]

Domain= [0,18], Range = [0,31.50]
If Charlie will only go to a single ride one time the possible rides he could go on would be 0 rides to all 18 rides for a domain of [0,18]. The output of the maximum and minimum x values would give us 0 dollars for riding 0 rides and 31.50 for riding all 18 (1.75 *0 = 0) and (1.75*18 = 31.50) so the range is [0, 31.50]

3 0

3 years ago

Help anyone plsssss

MariettaO [177]

Answer: third option: 15(x+3) hope this helps.

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3 years ago

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The average score of all golfers for a particular course has a mean of 71 and a standard deviation of 3. Suppose 36 golfers play

Zielflug [23.3K]

Answer:

.0228

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .