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kobusy [5.1K]
3 years ago
8

Simplify the expression: 2+(a +5) =

Mathematics
2 answers:
nekit [7.7K]3 years ago
6 0
Answer:

a+7

Step-by-step explanation:

2 + 5 = 7
7+a or a+7
Nataliya [291]3 years ago
6 0

Answer:

a=-7

Step-by-step explanation:

first we do commutative property of real number

the expression becomes ;

2+(7+a)=

then association property follow-up

(2+7)+a=

7+a=

then we minus 7 to both sides

7-7+a=-7

0+a=-7

a=-7

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The number that rode in columns was 3 2/3 times the number that rode in rows. If 2200 rode in columns, how many rode in rows?
melamori03 [73]

Answer:

600

Step-by-step explanation:

Given parameters:

    Number that rode in columns = 3\frac{2}{3} times the number that rode in rows.

       2200 rode in columns

Unknown:

Number of people that rode in rows = ?

Solution:

  Let the number of people that rode in columns  = C

   Let the number of people that rode in rows  = R

                 C = \frac{11}{3}R

Number of people that rode in rows  = 2200;

            2200 =  \frac{11}{3}R

             11R  = 2200 x 3

                R  = \frac{2200 x 3}{11}

                R = 200 x 3

               R  = 600

Number of people that rode in rows  = 600

3 0
3 years ago
What is the equation of the line that passes through the point (1,3) and has a slope of 6
son4ous [18]

Answer:

Y=6x+-3

Step-by-step explanation:

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8 0
3 years ago
Y=√x find dy/dx pls show steps
katrin2010 [14]
This involves a quick application of the power rule, which is f'(x)=nx^{n-1}.

First, it is helpful to rewrite f(x)=\sqrt{x} as f(x)=x^{\frac{1}{2}}. Remember that these are equivalent forms, but the latter is easier to use with the power rule.

We apply the power rule and simply:

\frac{1}{2}(x)^{(\frac{-1}{2})}=\dfrac{1}{2x^{1/2}} = \dfrac{1}{2 \sqrt{x} }
4 0
4 years ago
Jonathan has collected of 400 marbles. Blue marbles make up 17% of his collection.
Inessa05 [86]
Hello there!

Based from this question above, what this is asking is to find how much does 17% goes into 400 marbles.

We want to know how many marbles are in this 400 marbles. (This would be the key point)

We do (17% x 400).

By putting the "%" symbol this allows us the understand that we are trying to find out how many blue marbles they're going to be.

By multiplying them both together, we got our answer as (68) marbles.

Your correct answer would he 68.

I hope this helps you!
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4 years ago
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topjm [15]

Answer:

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Step-by-step explanation:

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