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3 years ago

14

Marley brought 290 pennies to the bank. How many dimes did marley get?

1 answer:

igor_vitrenko [27]3 years ago

6 0

2 one dollar bills 3 quarters 1 dime and 1 nickel

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Help me with this fast pleaseee

sveta [45]

I’m confused on what it is asking

4 0

3 years ago

An airplane pilot is fertilizing a field. The height y in feet of the fertilizer t seconds after it is dropped is modeled by y(t

zheka24 [161]

Answer:

About 360.178 feet

Step-by-step explanation:

So we want the vertical distance between the fertilizer and the ground to be 0.

This going to be about the time the pilot has dropped it

So we first need to find when y is 0.

$0=-16t^2-3t+300$

We are going to use the quadratic formula to solve for t:

$a=-16$

$b=-3$

$c=300$

The quadratic formula is:

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

$t=\frac{3 \pm \sqrt{(-3)^2-4(-16)(300)}}{2(-16)}$

$t=\frac{3 \pm \sqrt{9+19200}}{-32}$

$t=\frac{3 \pm \sqrt{19209}}{-32}$

$t=\frac{3+\sqrt{19209}}{-32} \text{ or } \frac{3-\sqrt{19209}}{-32}$

$t \approx -4.424891774 \text{ or } 4.237391774$

So the pilot has released it at about 4.237391774 seconds since the fertilizer has actually hit the ground at roughly this time.

So we want to know the horizontal distance at t=4.237391774:

$85t$

$85(4.237391774)$

$360.1783008$

360.178 feet

7 0

3 years ago

Four more than six multiplied by a number is seven

k0ka [10]

Answer:

4+6n=7

n=1/2

Step-by-step explanation:

put the numbers in and n= a number

8 0

3 years ago

HELP WILL GIVE BRAINLIEST

nadezda [96]

Answer:

$\frac{x^{2} }{1} +\frac{y^{2} }{2}=1$

Step-by-step explanation:

The directrices of an ellipse are defined by

$x=(+-)\frac{a}{e}$

Where $a >b$ , and $e$ is the eccentricity defined by $e=\frac{c}{a}$

So, in the first choice, we have the equation

$\frac{x^{2} }{4}+\frac{y^{2} }{1} =1$

Where $a^{2}=4$ and $b^{2}=1$ , which means $a=2$ and $b=1$ .

In an ellipse, we have the relation

$c^{2}=a^{2}-b^{2}$

Replacing values, we have

$c^{2} =4-1=3\\c=\sqrt{3}$

So, the eccentricity is $e=\frac{\sqrt{3} }{2}$ and the directrices are $x=(+-)\frac{2}{\sqrt{3} }$ , which means the first choice is not the right answer. In other words, the right answer is the second choice, because third and fourth choices don't represent an ellipse, both fractions must be positive in that case.

Therefore, the right answer is

$\frac{x^{2} }{1} +\frac{y^{2} }{2}=1$

3 0

4 years ago

In a group of 60 students, 15 liked maths only, 20 liked science only and 5 did not liked any of two subjects. How many of them

evablogger [386]

Answer:

35

Step-by-step explanation:

Given

n (A) = 15

n (B) = 20

Students who do not like any subject = 5

Hence, number of students who would like either both or either of the two subjects = 60-5 = 55

n (A or B) = n (A) + n (B) - n (A and B)

Number of students linking both the subjects

55 - 15-20

= 55-35 = 20

Number of students linking only one subject = 60-20-5 = 35

4 0

3 years ago