Least to greatest 2.8 2 3/4 -2.2 recurrin

What is the value of x in the equation 0.2(x + 1) + 0.5x = –0.3(x – 4)

almond37 [142]

0.2x+0.2+0.5x=-0.3x+1.2
0.7x+0.3x=1.2-0.2
x=1
That's your answer.

8 0

4 years ago

Read 2 more answers

Is there exam and answers x+7

vlada-n [284]

Answer:

8

Step-by-step explanation:

7 0

3 years ago

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On a test with a population mean of 75 and standard deviation equal to 16, if the scores are normally distributed, what percenta

sashaice [31]

Answer:

Percentage of scores that fall between 70 and 80 = 24.34%

Step-by-step explanation:

We are given a test with a population mean of 75 and standard deviation equal to 16.

Let X = Percentage of scores

Since, X ~ N( $\mu,\sigma^{2}$ )

The z probability is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1) where, $\mu$ = 75 and $\sigma$ = 16

So, P(70 < X < 80) = P(X < 80) - P(X <= 70)

P(X < 80) = P( $\frac{X-\mu}{\sigma}$ < $\frac{80-75}{16}$ ) = P(Z < 0.31) = 0.62172

P(X <= 70) = P( $\frac{X-\mu}{\sigma}$ < $\frac{70-75}{16}$ ) = P(Z < -0.31) = 1 - P(Z <= 0.31)

= 1 - 0.62172 = 0.37828

Therefore, P(70 < X < 80) = 0.62172 - 0.37828 = 0.24344 or 24.34%

6 0

4 years ago

Jamal filled his gas tank and then use 7/16 of the tank for traveling to visit his grandfather. He then used 1/3 of the remainin

Lisa [10]

Answer:

$\frac{3}{8}$

Step-by-step explanation:

Let's tackle each statement at a time:

Jamal filled his gas tank of which he used $\frac{7}{16}$ .

We need to express the unit (a gas tank) in terms of fractions so that we can substract $1-\frac{7}{16}$ .

The denominator of the second term of our substraction is $16$ , so we can express the first term as $\frac{16}{16}$ . Now that we have the same denominator in both terms, we can proceed to define $16$ as a common denominator and rewrite the expression as: $\frac{16-7}{16}$ , which gives us a result of $\frac{9}{16}$ , which is what Jamal has left after visiting his grandfather. This expression cannot be simplified anymore.