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3 years ago

Which number is a factor of 20, but not a multiple of 2? 12, 5, 10 or 4?

2 answers:

6 0

5 is your answer

20/4 = 5 however,

2 x 2.5 = 5 (it doesn't work, cannot have decimals)

so 5 is your answer

hope this helps

tia_tia [17]3 years ago

6 0

Factors of 20 are: 1,20:2,10:4,5.
So 1 or 20 is that number

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Two sisters like to compete on their bike rides. Tamara can go 4 mph faster than her sister, Samantha. If it takes Samantha 1 ho

Triss [41]

Answer:

16 mph

Step-by-step explanation:

You should first form equations related to this information

Given,Tamara can go 4 mph faster than her sister, Samantha

Lets take speed to ride a bike for Samantha to be= x mph

The speed to ride a bike for Tamara will be= x+4 mph

To cover a distance of 80 miles, Samantha takes 1 hour longer than Tamara

Introduce the formula for time; time=distance/speed=D/S where D is distance in miles and S is speed in miles per hour

Here time Samantha takes to cover a distance of 80 miles is 1 hour more than that taken by Tamara, hence

<u>Time taken by Samantha</u>

$=\frac{80}{x}$

<u>Time taken by Tamara</u>

$=\frac{80}{4+x}$

<u>Equation for difference in time</u>

$=\frac{80}{x} -\frac{80}{4+x} =1$

Solve the equation for difference in time to get value of x which is samantha speed

$=\frac{80}{x} -\frac{80}{x+4} =1\\\\\\=80(4+x)-80(x)=x(4+x)\\\\\\=320+80x-80x=4x+x^2\\\\\\=x^2+4x-320=0$

Solve quadratic equation by the quadratic formula where a=1,b=4 and c=-320

x=(-b±√b²-4ac)÷2a

x=(-4±√4²-4×1×-320)÷2×1

$x=\frac{-4+/-\sqrt{4^2-4*1*-320} }{2} \\\\\\x=(-4+/-\sqrt{1296} )/2\\\\\\x=\frac{-4+36}{2} =\frac{32}{2} =16$

Samantha speed is 16 mph

6 0

3 years ago

A standard deck of 52 playing cards contains four of each numbered card 2–10 and four each of aces, kings, queens, and

DerKrebs [107]

Answer:

A standard deck of 52 playing cards contains four of each numbered card 2–10 and four each of aces, kings, queens, and jacks. Two cards are chosen from the deck at random.

Which expression represents the probability of drawing a king and a queen?

StartFraction (4 P 1) (3 P 1) Over 52 P 2 EndFraction

StartFraction (4 C 1) (3 C 1) Over 52 C 2 EndFraction

StartFraction (4 P 1) (4 P 1) Over 52 P 2 EndFraction

StartFraction (4 C 1) (4 C 1) Over 52 C 2 EndFraction

it is D

Step-by-step explanation:

3 0

3 years ago

Negative 99610=1700 minus 55g

Stella [2.4K]

-99610=1700-55g
-1700 -1700
-101310=-55g
---------- ------
-55 -55

1842=g

4 0

3 years ago

What is the answer to b

ziro4ka [17]

Should be "4+4+7x2=30"

6 0

3 years ago

Read 2 more answers

(-4+2i)(7-2i) <br> Anyone know how to do this??

avanturin [10]

Answer:

Step-by-step explanation:

Use the FOIL method of multiplication of binomials:

(-4+2i)(7-2i) = -28 + 14i + 8i - (-4)i²

Note that i² = -1. Thus, - (-4)i² = +4, and we then have:

-28 + 22i + 4, or

-24 + 22i

4 0

3 years ago