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nordsb [41]
3 years ago
9

If a car’s rate is 20 miles/1/2 hr, then its rate is also 40 miles per hour.

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
8 0
Unit rate .... 1 to 40 ratio.
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Brenda bought five hats. A week later half
VashaNatasha [74]

Answer:

Step-by-step explanation:

23 divided by X. X=half of 23. but really, you need to add to it. other than that i can't help ya, all i know is that half of 23 is 11.5

8 0
3 years ago
Please help I asked this question earlier and nobody answered! :(​
tatiyna

Answer:

B

Step-by-step explanation:

One way to tell is to put both equations into slope-intercept form.  That form is usually written y=mx+b where  <em>m</em>  is the slope and  <em>b</em>  is the y-intercept.

Solve the first equation for y.

6x+2y=5 \\ 2y=-6x+5 \\ y=-3x+5/2

The slope of this line is -3, and its y-intercept is 5/2.

Solve the second equation for y.

y+3x=2\\y=-3x+2

The slope of this line is -3 and its y-intercept is 2.

The lines are parallel because they have the same slope and <u>different</u> y-intercepts.  There is no solution to the system.

8 0
3 years ago
The table represents an exponential function.
devlian [24]
Hello,
f(1)=2\\&#10;f(2)= \dfrac{2}{5} =2*5^{-1}\\&#10;f(3)= \dfrac{2}{25} =2*5^{-2}\\&#10;f(4)= \dfrac{2}{125} =2*5^{-3}\\\\&#10;&#10;\boxed{f(x)= 2*5^{-x}} \\&#10;&#10;&#10;
4 0
4 years ago
Find the probability that when a couple has three children, at least one of themis a girl. (Assume that boys and girls are equal
kvv77 [185]

Answer:   \bold{\dfrac{7}{8}=87.5\%}

<u>Step-by-step explanation:</u>

"At least one girl" means P(1 girl) + P(2 girls) + P(3 girls)   or   1 - P(all boys)

I will use the latter: 1 - P(all boys)

P(all boys) = \dfrac{1}{2}\times \dfrac{1}{2}\times \dfrac{1}{2}=\dfrac{1}{8}

1 - P(all\ boys) \quad = \quad 1-\dfrac{1}{8}\quad =\large\boxed{\dfrac{7}{8}}

6 0
3 years ago
How many permutations are there of the letters in the word surprise?
azamat
Surprise, there 8 letters.
So, 8*7*6*5*4*3*2*1= 40, 320
5 0
3 years ago
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