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Lunna [17]
2 years ago
14

State whether each equation is true or false 2(4+5)=13

Mathematics
2 answers:
Mandarinka [93]2 years ago
5 0
2(4+5)
2(9)
18

18 does not equal 13.
Final answer: False

Remember to solve by working within parentheses first according to the order of operations.
Sergeeva-Olga [200]2 years ago
4 0
False 2(4+5)=13 equal 18
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find the value of c that makes each trinomial a perfect square. then write the trinomial as a perfect square. the equation , x^2
mr Goodwill [35]
Therefore, the value of C should be (11/2)^2

<span>To square a fraction, take the square of the numerator and put it over the square of the denominator. So since 11^2=121 and 2^2=4, (11/2)^2
(11)^2/(2)^2=121/4
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5 0
2 years ago
If c+1/d=5 , what is the value of 30d/2c+2
klemol [59]

Answer:

3

d\in R,\hspace{5}d\neq 0

Step-by-step explanation:

You can solve for any variable. From the first equation, let's solve for c :

\frac{c+1}{d} =5\\\\c+1=5d\\\\c=5d-1

Now, replace the value of c into the other equation:

\frac{30d}{2c+2} \\\\\frac{30d}{2(5d-1)+2} \\

Using distributive property

\frac{30d}{10d-2+2} =\frac{30d}{10d} =3

However, keep in mind that this is true for:

d\in R,\hspace{5}d\neq 0

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