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stealth61 [152]
2 years ago
7

Which statement best describes the expression 4+2?

Mathematics
2 answers:
vaieri [72.5K]2 years ago
3 0

Answer:

D

Step-by-step explanation:

zalisa [80]2 years ago
3 0
The expression 4+2 is the sum of two terms.
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Jan walked 1/2 mile in 1/3 hours. at this rate, how far will she walk in one hour?
Oxana [17]
I hope this helps you

6 0
3 years ago
Alon and his friend Marna own a chimney sweep service company. Working together, they can clean a 20-foot chimney in 1 Five-seve
Akimi4 [234]

Answer:

3 hours

Step-by-step explanation:

Given that:

Time taken by Kalon = 4 hours

Time taken by Marna =?

Time taken if the work together = 1 5/7 hours

Kalon's rate = 1/ time =. 1/4

Kalon + Marna = 1 ÷ 1 5/7 = 7/12

Hence,

Marna's rate = 7/12 - 1/4

Marna's Rate = (7 - 3) / 12 = 4/12 = 1/3

Marna's rate = 1/3

Hence, time it takes Marna = reciprocal of rate = 1÷ 1/3 = 1 * 3/1 = 3 hours

6 0
2 years ago
Read 2 more answers
When flipping a fair coin 4 times in a row, which outcome is more likely: HTHT or HHHH.
Vlad1618 [11]

Answer:

See below

Step-by-step explanation:

equal probability    each occurs 1 time out of 16 possibilities

tttt

ttth

ttht

tthh

thtt

thth

thhh

httt

htth

thth

<u>htht</u>

hthh

hhtt

hhth

hhht

<u>hhhh</u>

3 0
1 year ago
How do you solve an equation with 2 variables on one side and and the answer on the other
Irina-Kira [14]

Answer: combine like terms dude

Step-by-step explanation:

8 0
3 years ago
a psychologist contends that the number of facts of a certain type that are remembered after t hours is given by the following f
laiz [17]

Answer:

At t=1, Rate of Change=-36.86

At t=10 hours, Rate of Change =-0.0088

Step-by-step explanation:

The function which describes the number of facts of a certain type which are remembered after t hours is given as:

f(t)=\frac{85t}{99t-85}

To determine the Rate of Change at the given time, we first look for the derivative of f(t).

Applying quotient rule:

f^{'}(t)=\frac{-7225}{{\left( 85 - 99\,t\right) }^{2}}

At t=1

f^{'}(1)=\frac{-7225}{(85-99)^{2}}

=-36.86

At t=10 hours

f^{'}(10)=\frac{-7225}{(85-99(10))^{2}}

=-0.0088

4 0
3 years ago
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