2 years ago

Pls help me on this question

Mathematics

1 answer:

Maksim231197 [3]2 years ago

7 0

The answer is selections 1 and 4

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The cost of 10 oranges is 1$. What is the cost of 5 dozen oranges

dmitriy555 [2]

6 dollars

10=1 dollar

5 dozen = 60

60 divided by 10 is 6

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3 years ago

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Mean for 16, 12, 13, 22

pishuonlain [190]

Answer:

mean = sum of the terms/total no. of terms

mean = (16+12+13+22)/4

mean = 63/4 or 15.75

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3 years ago

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**A rock dropped from a 100 foot tower.

mars1129 [50]

Answer:

2.83 s

Step-by-step explanation:

We are given that

$h(t)=-16t^2+10t+100$

When a rock reached the ground then h(t)=0

$-16t^2+10t+100=0$

$16t^2-10t-100=0$

Using quadratic formula

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$t=\frac{10\pm\sqrt{(-10)^2-4\times 16\times (-100)}}{2(16)}$

$t=\frac{10\pm\sqrt{100+6400}}{32}$

$t=\frac{10+\sqrt{6500}}{32}=2.83$

$t=\frac{10-\sqrt{6500}}{32}=-2.2$

Time cannot be negative .Therefore, negative value of t can not be possible.

Hence, the rock takes 2.83 sec to reach the ground.

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3 years ago

Write the expression without radicals, using only positive exponents

Mamont248 [21]

Answer:

$\sqrt[3]{a^{2}+b^{2}}=(a^{2}+b^{2})^{\frac{1}{3}}$

Step-by-step explanation:

∵∛x = (x)^1/3

∴ $\sqrt[3]{a^{2}+b^{2}}=(a^{2}+b^{2})^{\frac{1}{3}}$

So you can replace the radicals by fractional exponents

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The total cost of a truck rental, y, for x days, can be modeled by y=24x+39. What is the rate of change for this function?

padilas [110]

Answer:

24 per day

Step-by-step explanation:

'x' = days, so since 24 is with x, the rate of change is 24

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3 years ago