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3 years ago

A shop owner offered a 20% discount off the regular price of a mirror, The amount of the

Mathematics

1 answer:

AVprozaik [17]3 years ago

6 0

A=15
I guessed and checked $15 - 20% and got 3

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What is the value of f(7)

kkurt [141]

F(7) means f(x) when x = 7. The x is replaced with 7.

So we'll replace every x with 7 to go from x = 7 to 3-x = 3-7 = -4

Put another way
f(x) = 3-x
f(7) = 3-7
f(7) = -4

Answer: -4

8 0

3 years ago

Read 2 more answers

A sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's p

charle [14.2K]

Answer:

So the value of the test statistic is -0.85.

Step-by-step explanation:

We know that a sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 54% of the chips do not fail in the first 1000 hours of their use.

We get that:

$n=1800\\\\p_1=53\%=0.53\\\\p_2=54\%=0.54\\$

We calculate the standar deviation:

$\sigma=\sqrt{\frac{0.53 \cdot (1-0.53)}{n}}=\sqrt{\frac{0.53 \cdot 0.47}{1800}}=0.01176$

We calculate the value of the test statistic:

$z=\frac{p_1-p_2}{\sigma}=\frac{0.53-0.54}{0.01176}=-0.85$

So the value of the test statistic is -0.85.

5 0

4 years ago

Show the number 154 in two other ways

rewona [7]

Answer:

Step-by-step explanation:

one hundred fifty-four

2 * 7 * 11

2 * 77

7 * 22

11 * 14

$\sqrt{23,716}$

$\frac{308}{2}$

Not 100% sure what you're asking for, but all these will equal 154.

7 0

3 years ago

here a subtraction problem that has been solved incorrectly what is the right answer for 74-25=59 but do it in the addition sent

madam [21]

Answer:

the equation is wrong

Step-by-step explanation:

=> 74-25=59

since 74 - 25 equals to 59 in order to find the addition sentence that will check the subtraction problem is true and 59 and 3/5 or you can add add 59 and 25 to check if the problem was solved correctly

=> 59+25

add 59 to 25

=> 84

this means the question is wrong

5 0

3 years ago

Read 2 more answers

Really could use the help

SVEN [57.7K]

c squared= a squared+b squared so c squared=25+64 so the answer would be the square root of 89. Hope this helps!!

7 0

3 years ago