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max2010maxim [7]
3 years ago
9

Shelly spent 17 min washing the dishes and 38 min for cleaning her room.explain how you can mental math to find how long Shelly

spent on the two tasks
Mathematics
1 answer:
tatuchka [14]3 years ago
6 0
Well you could round which would make it easier but not exact so like 20+40=60 minutes but if it needs to be exact it wouldnt be hard to just do 17+38= 55 hope this helps:)
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Janine wants a necklace 45 beads long 
seraphim [82]
If there are 45 beads, with a ratio of 1:4
Then,
\frac{45}{5}=9
Then if \frac{1}{4}=\frac{9}{x}
Then x=9*4
Therefore, x=36
Meaning, there would be a ratio of 36 beads to 9 beads
4 0
3 years ago
Read 2 more answers
HELP PLEASE!! Brainliest to whoever gets it right.
Aleks04 [339]

Answer:

A

Step-by-step explanation:

i think you might want to wait for other people because i dont  know for sure

4 0
2 years ago
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Jerald jumped from a bungee tower. If the equation that models his height, in feet, is h = –16t2 + 729, where t is the time in s
Snezhnost [94]

Answer. First option: t > 6.25


Solution:

Height (in feet): h=-16t^2+729

For which interval of time is h less than 104 feet above the ground?

h < 104

Replacing h for -16t^2+729

-16t^2+729 < 104

Solving for h: Subtracting 729 both sides of the inequality:

-16t^2+729-729 < 104-729

-16t^2 < -625

Multiplying the inequality by -1:

(-1)(-16t^2 < -625)

16t^2 > 625

Dividing both sides of the inequality by 16:

16t^2/16 > 625/16

t^2 > 39.0625

Replacing t^2 by [ Absolute value (t) ]^2:

[ Absolute value (t) ]^2 > 39.0625

Square root both sides of the inequality:

sqrt { [ Absolute value (t) ]^2 } > sqrt (39.0625)

Absolute value (t) > 6.25

t < -6.25 or t > 6.25, but t can not be negative, then the solution is:

t > 6.25



5 0
3 years ago
Read 2 more answers
What is the value of b in the equation 3b + 2(b − 1) = 8?
Ray Of Light [21]
<span>3b + 2(b − 1) = 8
3b + 2b - 2 = 8
5b = 10
b = 2

answer b = 2</span>
7 0
3 years ago
Read 2 more answers
Round 2769.44 to the nearest tenths place
vlada-n [284]
It would be 2769.44 still since it would technically be 2769.440 if you were rounding to the TENTHS place. The Zero(0) doesn't change anything so the answer is

2769.44
4 0
3 years ago
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