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tia_tia [17]
4 years ago
11

Which statement must be true?

Mathematics
1 answer:
rosijanka [135]4 years ago
3 0

Answer: A is the correct answer

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By what factor is the volume of a right square pyramid multiplied if its height is multiplied by 8 but the dimensions of its bas
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We have that 
the volume of a right square pyramid ---------- > (1/3)b²h

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V1------------ > initial volume
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<span>if its height is multiplied by 8
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V2=(1/3)b²(8h)-------------- > V2=V1*8

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3 years ago
If degree of a polynomial ab³c²​
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Step-by-step explanation:

zero ...................

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3 years ago
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2. CTfastrak bus waiting times are uniformly distributed from zero to 20 minutes. Find the probability that a randomly selected
Juliette [100K]

Answer:

b. 0.25

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if the waiting time x follows a uniformly distribution from zero to 20, the probability that a passenger waits exactly x minutes P(x) can be calculated as:

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P(X

Then, the probability that a randomly selected passenger will wait:

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P(5

c. Exactly 7.5922 minutes

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d. Exactly 5 minutes

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6 0
3 years ago
Plz help in solving these 2 questions with steps and explanation!!
fomenos

Answer:

\large\boxed{Q1:\ x=2\ or\ x=5}\\\boxed{Q2:\ x=1-\sqrt{21}\ or\ x=1+\sqrt{21}}

Step-by-step explanation:

\text{Use the quadratic formula:}\\\\ax^2+bx+c=0\\\\\text{If}\ b^2-4ac0,\ \text{then the equation has two solutions}\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\==========================================

\bold{Q1}\\\\x^2-7x+10=0\\\\a=1,\ b=-7,\ c=10\\\\b^2-4ac=(-7)^2-4(1)(10)=49-40=9>0\\\\\sqrt{b^2-4ac}=\sqrt9=3\\\\x_1=\dfrac{-(-7)-3}{2(1)}=\dfrac{7-3}{2}=\dfrac{4}{2}=2\\\\x_2=\dfrac{-(-7)+3}{2(1)}=\dfrac{7+3}{2}=\dfrac{10}{2}=5\\\\========================================

\bold{Q2}\\x^2-2x=20\qquad\text{subtract 20 from both sides}\\\\x^2-2x-20=0\\\\a=1,\ b=-2,\ c=-20\\\\b^2-4ac=(-2)^2-4(1)(-20)=4+80=84>0\\\\\sqrt{b^2-4ac}=\sqrt{84}=\sqrt{4\cdot21}=\sqrt4\cdot\sqrt{21}=2\sqrt{21}\\\\x_1=\dfrac{-(-2)-2\sqrt{21}}{2(1)}=\dfrac{2-2\sqrt{21}}{2}=1-\sqrt{21}\\\\x_2=\dfrac{-(-2)+2\sqrt{21}}{2(1)}=\dfrac{2+2\sqrt{21}}{2}=1+\sqrt{21}

3 0
4 years ago
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I think it is 6 but im not sure
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3 years ago
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