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mafiozo [28]
2 years ago
11

Josie walks 3/4 mile in 1/5 hour what is josie speed in miles per hour

Mathematics
1 answer:
Over [174]2 years ago
5 0

Answer: 3\dfrac34\text{ miles per day}

Step-by-step explanation:

We know that the formula to find speed is given by :-

\text{speed}=\dfrac{\text{distance}}{\text{time}}

Given: Distance = \dfrac34 mile

Time = \dfrac15 hour

Speed = \dfrac{\dfrac34}{\dfrac15}\text{ miles per hour}

=\dfrac{3}{4}\times5\text{ miles per hour}\\\\=\dfrac{15}{4}\text{ miles per hour}\\\\=3\dfrac34\text{ miles per day}

hence, speed =3\dfrac34\text{ miles per day}

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What is the solution to the system of equations?
elixir [45]

Answer:

No solution

Step-by-step explanation:

-3x-4y-3z=-7\\2x-6y+2z=3\\5x-2y+5z=9\\\\

Lets consider the equation 2.

Here we multiply the LHS and RHS with (-1).

-3x-4y-3z=-7\\-(2x-6y+2z)=-3\\5x-2y+5z=9\\\\

Hence,

-3x-4y-3z=-7\\-2x+6y-2z=-3\\5x-2y+5z=9\\\\

When we add the equations we get,

0x+0y+0z=-10+9\\Hence,\\0=-1

As 0 doesn't equal to -1, answer is d) No solution

6 0
2 years ago
What is the value of the function f(x)=2x^2+3 when x=2?
Marina86 [1]
The answer would be A because you would just plug in 2 everywhere where you see x

7 0
3 years ago
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Rice is being poured into a cylindrical container with radius 4.5 inches so
12345 [234]

asked:the istant of height is the same as the radius

given facts:cylindrical container with radius 3.5 inches height of rice increasing 0.5 inches per second

solve hidden given:(4.5+o.5+2)

what operation to be used: addition and subtraction

solve+4.5+05+2=6.0

chec: 6.0-4.5=1.5

8 0
2 years ago
Five less than twice the square of a negative number is -9 times the number. Find the number.​
Rashid [163]
Since the first part says the value is five less then twice the square of a negative number we get the first equation as 2(-x)²-5. Then we have that -9x is equal to that previous equation. Therefore our new equation is 2(-x)²-5=-9x. We can move the nine over by adding it to both side to get 2(-x)²+9x-5=0. Then you can use any method of factoring (I prefer quadratic formula) to get your values for x. By doing so, you’ll get x=28 and x=-32.5. Since the problem said the number was negative in the first part, you know you can’t have the 28 as the answer so the right answer is -32.5.

3 0
2 years ago
Find 4.5×10^7 over 1.5×10^-8 . write answer in scientific notation.
Sati [7]

Answer:

\large\boxed{\dfrac{4.5\times10^7}{1.5\times10^{-8}}=3\times10^{15}}

Step-by-step explanation:

The scientific notation:

a\times10^k\ \text{where}\ 1\leq a

We have:

\dfrac{4.5\times10^7}{1.5\times10^{-8}}=\dfrac{4.5}{1.5}\times\dfrac{10^7}{10^{-8}}

Use

\dfrac{a^n}{a^m}=a^{n-m}

=3\times10^{7-(-8)}=3\times10^{7+8}=3\times10^{15}

4 0
3 years ago
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