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torisob [31]
3 years ago
9

Danny had 20 minutes to do a three-problem quiz. He spent 9 1/4 minutes on question A and 5 4/5 minutes on question B. How much

time did he have left for question C?
Mathematics
1 answer:
Travka [436]3 years ago
6 0

Answer:

4 19/20

Step-by-step explanation:

9 1/4 + 5 4/5 = 15 1/20

20- 15 1/20 = 4  19/20

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In 1980 (before the era of in-vitro fertilization), there were 3,612,258 births in the United States (according to the U.S. Cens
scoray [572]

Answer:

There was a 1.93% probability of having multiples (twins or more) in 1980.

Step-by-step explanation:

There were 3,612,258 births in the US in 1980.

Of those,

68339 + 1337 = 69676 were multiplies.

So

What was the probability of having multiples (twins or more) in 1980?

P = \frac{69676}{3612258} = 0.0193

There was a 1.93% probability of having multiples (twins or more) in 1980.

8 0
3 years ago
-2-2x+3x+2 in simplified expression
Nadusha1986 [10]

Answer: 1x+0

Step-by-step explanation:

Put the like terms together I believe

7 0
3 years ago
Read 2 more answers
What is 3.4 in fraction
Anna [14]
\rm 3,4= \frac{34}{10}\\\\We\ can\ simplify\ this\ fraction:\\\\\  \frac{34\div2}{10\div2}=\boxed{ \frac{17}{5} }

So,\ \boxed{3.4=\boxed{\frac{17}{5} }}
8 0
3 years ago
Does the equation 2x+ 3y=-6, 4x+6y=-12 have infinetley many solutions
Vadim26 [7]

Answer:

Yes it has infinity of solutions.

Step-by-step explanation:

If you plug in certain numbers it will make the statements true.

5 0
2 years ago
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The length of a rectangle is 6 inches more than its width. Its area is 91 square inches. The length is .
Vika [28.1K]

Answer:

13 in

Step-by-step explanation:

let w be width then length is w + 6

the area (A) of a rectangle is calculated as

A = length × width , then

A = w(w + 6) = 91 , that is

w² + 6w = 91 ( subtract 91 from both sides )

w² + 6w - 91 = 0 ← in standard quadratic form

(w + 13)(w - 7) = 0 ← in factored form

equate each factor to zero and solve for w

w + 13 = 0 ⇒ w = - 13

w - 7 = 0 ⇒ w = 7

however, w > 0 then w = 7

and length = w + 6 = 7 + 6 = 13 in

8 0
2 years ago
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