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timurjin [86]
3 years ago
7

Twice the sum of a number and 3 is the same as 5 subtracted from the number. find the number.

Mathematics
1 answer:
12345 [234]3 years ago
3 0
Translating this sentence into symbols:  2(x+3) = x - 5

So 2x + 6 = x - 5                    and x = -11

Check:  Is 2(-11+3) = -11 -5?               Is -16 = -16?  YES.  x =-11 is right.
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For his exercise today, Manuel plans to both run and swim. Let r be the number of laps he runs and lets be the number of laps he
QveST [7]

Answer:

The Inequality describing the situation is 3r+2s>45.

Step-by-step explanation:

Let the number of laps he runs be 'r'

Let the number of laps he swims be 's'

Now Given:

Time required to run each lap = 3 min

Time required to swim each lap = 2 min

Total minutes he need to exercise more than 45

we need to write the Inequality representing the same.

Solution:

Now we can say that;

Time required to run each lap multiplied by the number of laps he runs plus Time required to swim each lap multiplied by the number of laps he swims should be greater than Total minutes he need to exercise.

framing in equation form we get;

3r+2s>45

Hence The Inequality describing the situation is 3r+2s>45.

6 0
3 years ago
I need to find two equivalent fractions for each whole number. the whole numbers are 4, 5, 3, and 6.
Archy [21]
For the #4 - 8/2 & 16/4
For the #5 - 10/2 & 25/5
For the #3 - 6/2 & 9/3
For the #6 - 12/6 & 36/6

I think these are right .. Hope this helps. (:
6 0
3 years ago
Solution of the equation
Bond [772]

Answer:

B

Step-by-step explanation:

The sides are not equal.  You substitute the coordinates into the equation which gives you -11=-4 x 3

which solves to -11 = -12

therefore the sides are not equal

Use Symbolab for math problems, it helps alot especially on tests.

7 0
3 years ago
Which expression is a factor of 21x2 + 13x − 20?
seraphim [82]
Answer: A............
6 0
3 years ago
Which number is the median? 5, 15, 16, 20, 21, 21, 23, 23, 23, 26, 26, 26, 26, 27, 27, 29, 29, 29, 29, 29, 30, 30, 30, 30
scoray [572]

Answer:

median is 26

Step-by-step explanation:

26+26=52

52÷2=26

8 0
3 years ago
Read 2 more answers
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