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3 years ago

PLEASE HELP PLEASE HELP

Mathematics

1 answer:

tekilochka [14]3 years ago

6 0

These can be a bit tricky. The teeny 1 there tells us this grid is 1x1 cells. The open circles at the end of the segments indicate the endpoint is not part of the function. The filled circles indicate that endpoint is part of the function.

The origin is where the x and y axes meet. f(-3) means we start at the origin and count three units to the left, left being the negative direction. Then we eyeball the figure to see where the vertical line x=-3 intersects f. It's at the black dot in the lower left quadrant, which is four down from the y axis, so the point (-3, -4)

That means f(-3)=-4

Answer: first choice

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A circle is centered on point B. Points A, C and D lie on its circumference.

Firlakuza [10]

Answer:

<h2>The angle ABC is 70°.</h2>

Step-by-step explanation:

You can observe a representation of the problem in the image attached.

According to the inscribed angle theorem, the angle created by two chords is half of its subtended arc, that means

$\angle ADC = \frac{1}{2}(AC)\\ 35\°=\frac{1}{2} (AC)\\AC=70\°$

Now, observe that the arc AC has as central angle the angle ABC, according to the theorem, the subtended arc and its central are congruent.

$\angle ABC \cong arc(AC)$

Therefore, the angle ABC is 70°.

6 0

3 years ago

Read 2 more answers

6. A bank auditor claims that credit card balances are normally distributed, with a mean of $3570

sergejj [24]

Answer:

Probability that their mean credit card balance is less than $2500 is 0.0073.

Step-by-step explanation:

We are given that a bank auditor claims that credit card balances are normally distributed, with a mean of $3570 and a standard deviation of $980.

You randomly select 5 credit card holders.

Let $\bar X$ = sample mean credit card balance

The z score probability distribution for sample mean is given by;

Z = $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\mu$ = population mean credit card balance = $3570

$\sigma$ = standard deviation = $980

n = sample of credit card holders = 5

Now, the probability that their mean credit card balance is less than $2500 is given by = P( $\bar X$  < $2500)

P( $\bar X$ < $2500) = P( $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ < $\frac{2500-3570}{\frac{980}{\sqrt{5} } }$ ) = P(Z < -2.44) = 1 - P(Z $\leq$ 2.44)

= 1 - 0.9927 = 0.0073

The above probability is calculated by looking at the value of x = 2.44 in the z table which has an area of 0.9927.

Therefore, probability that their mean credit card balance is less than $2500 is 0.0073.

4 0

3 years ago

Paulasia has 8.47 ounces of tofu. She divides the tofu into 10 equal pieces and gives one piece to each of her friends. How

Shtirlitz [24]

Answer:

Each piece of tofu weighs 0.847 ounces.

Step-by-step explanation:

8.47 divided by 10 = 0.847 ounces

Hope this helps

3 0

3 years ago

Tim's bank contains quarters, dimes and nickels. He has 3 more dimes than quarters and 6 fewer nickels than quarters. If he has

Aleksandr-060686 [28]

(x - 3) + (x - 6) + x = 63
x - 3 + x - 6 + x = 63
Combine like terms
3x - 9 = 63
Isolate the constant
3x - 9 + 9 = 63 + 9
3x = 72
Isolate the viable
3x / 3 = 72 / 3
x = 24

4 0

3 years ago

Identify the hypothesis of the statement below.

poizon [28]

Hello Crylicx, If the sum of the measures of two angles is 180° , then the angles are supplementary angles so if you saying if its true or false you answer is correct.

6 0

3 years ago