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3 years ago

Please explain, worth 20 points Question 8, by the way

Mathematics

2 answers:

choli [55]3 years ago

8 0

I think the answer is J. I'm not entirely sure though. You might want to get an expert in here LOL I'm pretty sure the answers J though.

earnstyle [38]3 years ago

4 0

The answer would be f because you have to do the amount of sketch pads * the amount they cost then the paintbrushes and their cost and the box of chalk and their cost. Then you add them all together because it is the simplified version of adding together 2.99 plus 2.99 plus 2.99 plus 2.99 plus 2.99 plus 5.99 plus 5.99 plus 15.99 = whatever it equals.

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If p and q are both true, then which of the following statements has the same truth-value as ~p → q?

olganol [36]

If p and q are both true, then

$\neg p \implies q$

is an implication of the form

$F \implies T$

which is true, because every implication starting with false is true, i.e.

$F \implies T = T,\quad F \implies F = T$

So, we're looking for an expression evaluating to true. Let's see what we have:

A) is an AND proposition. Logical AND is true only if both parts are true. So, you have

$\neg P \land \neg Q = F \land F = F$

So it's not the right option.

B) is an OR proposition. Logical OR is true whenever one of the two parts is true. So, you have

$\neg P \lor\neg Q = F \lor F = F$

So it's not the right option.

C) is again an AND proposition. You have

$P \land \neg Q = T \land F = F$

So this is not the right option.

D) Finally, the last one is again an implication, and again it starts with false:

$\neg Q \implies P = F \implies T = T$

So this is true, and thus is the correct option.

8 0

3 years ago

What is the value of expression?

kolezko [41]

$6^{-7}\cdot6^4=6^{-7+4}=6^{-3}$

4 0

3 years ago

The cheetah is the fastest land animal, capiable of attaining a speed of 110 km/h. In August 2009 , the world record for the men

lozanna [386]

Answer:

About 3 times faster

Step-by-step explanation:

Cheetah's speed = 110 km / hr

World 100m sprint record :

Speed of sprinter :

Distance / time

100 m / 9.58s

= 10.438413 m/s

Convert Cheetah's speed to m/s

110 km/hr = (110 * 1000)m / (60 * 60 s)

= 110000 m / 3600 s

= 30.55555 m/s

Number of times cheetah is faster than sprinter :

30.55555 m/s ÷ 10.438413 m/s

= 2.927 times

5 0

3 years ago

an experiment consists of flipping a fair coin 4 times. What is the probability of obtaining at least one head?

Dvinal [7]

$\mathbb P(X\ge1)=1-\mathbb P(X=0)$

The probability of getting 0 heads in 4 tosses (or equivalently, 4 tails) is $\dfrac1{2^4}=\dfrac1{16}$ .

So the desired probability is

$1-\dfrac1{16}=\dfrac{15}{16}$

7 0

3 years ago

Mei is trying to list as many prime numbers as she can for a challenge problem for her math class. She finds

Svet_ta [14]

Hello,

Since the degree of a polynomial is the highest exponent present, the degree of Mei’s polynomial should be 2.

6 0

3 years ago