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4 years ago

(4 1/5 ÷x+1 1/3 )÷2 4/35 − 4/5 =1 8/15 Solve For x

Mathematics

1 answer:

Alex_Xolod [135]4 years ago

5 0

Answer:

x = 7/6

Step-by-step explanation:

Solve for x:

35/74 (4/3 + 21/(5 x)) - 4/5 = 23/15

Bring 35/74 (4/3 + 21/(5 x)) - 4/5 together using the common denominator 1110 x:

(2205 - 188 x)/(1110 x) = 23/15

Cross multiply:

15 (2205 - 188 x) = 25530 x

Expand out terms of the left hand side:

33075 - 2820 x = 25530 x

Subtract 25530 x + 33075 from both sides:

-28350 x = -33075

Divide both sides by -28350:

Answer: x = 7/6

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4 years ago

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QUICK WHATS THIS ANSWER?!?

Mars2501 [29]

Answer:

C. $-x-6>-3.5$

Step-by-step explanation:

One is asked to find which inequality has ( $x=-3$ ) in its solution set. Remember that an inequality is another way to represent a set of solutions. In essence, it states that all numbers less than; less than or equal to; greater than; or greater than or equal to, are a part of the solution. One simplifies an inequality in a similar manner to how one simplifies an equation, by using inverse operations and simplification. Just note that when multiplying or dividing the inequality by a negative number, one has to flip the inequality sign to ensure the expression remains true.

Simplify each of the inequalities, then evaluate to see which one has ( $x=-3$ ) as a part of its solution set.

A. $-x -6$

$-x$

$x>-2.5$

B. $-x-6>3.5$

$-x>9.5$

$x$

C. $-x-6>-3.5$

$-x>2.5$

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D. $x-6>-3.5$

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As can be seen, option (C $-x-6>-3.5$ ) is the only one that fits this requirement. Since option (C) simplifies down to ( $x$ ) or in words, (x) is less than (-2.5). This option is the only one that fits the solution since (-3) is less than (-2.5).

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3 years ago

A quality control engineer is interested in estimating the proportion of defective items coming off a production line. In a samp

fenix001 [56]

Answer:

The lower bound of a 99% C.I for the proportion of defectives = 0.422

Step-by-step explanation:

From the given information:

The point estimate = sample proportion $\hat p$

$\hat p = \dfrac{x}{n}$

$\hat p = \dfrac{55}{100}$

$\hat p$ = 0.55

At Confidence interval of 99%, the level of significance = 1 - 0.99

= 0.01

$Z_{\alpha/2} =Z_{0.01/2} \\ \\ = Z_{0.005} = 2.576$

Then the margin of error $E = Z_{\alpha/2} \times \sqrt{\dfrac{\hat p(1-\hat p)}{n}}$

$E = 2.576 \times \sqrt{\dfrac{0.55(1-0.55)}{100}}$

$E = 2.576 \times \sqrt{\dfrac{0.2475}{100}}$

$E = 2.576 \times0.04975$

E = 0.128156

E ≅ 0.128

At 99% C.I for the population proportion p is: $\hat p - E$

= 0.55 - 0.128

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3 years ago

A triangle has sides of lengths 12,14 and 19 . Is it a right triangle?

Scorpion4ik [409]

Answer:

It could be

Step-by-step explanation:

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4 years ago

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podryga [215]

Answer:

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then following from the question now that we got the answer

so she have 6 cards first then it tripled and now it's 18 Then she added four now it's 22

your welcome

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3 years ago

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