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Cerrena [4.2K]
4 years ago
7

The answer to 2z+10=3z+20

Mathematics
2 answers:
stepan [7]4 years ago
7 0
Answer : z = (- 10) ;)
Eva8 [605]4 years ago
7 0
To find the answer first combine like terms and then isolate, which give s your -10.
Hope this helps.
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If f(x) = -x – 5 and g(x) = x2 – 15,<br> find f(-9) – 9(-3).<br> Your aſswer
lutik1710 [3]

Answer:

f(x)=-x-5

g(x)=x2-15

now

f(9)-9(-3)

[-9-5]+27

-11+27

16

6 0
3 years ago
If n = 20, use a significance level of 0.01 to find the critical value for the linear correlation coefficient r.
Oliga [24]

Answer:

0.561

Step-by-step explanation:

To solve this problem we must resort to external information that I will leave attached with the answer, it is a table that for each value of n, gives us the critical values.

Returns the critical values ​​for both the significant levels of 0.01 and 0.05.

If we go to the table we know that when n = 20 and the significant level is 0.01, the corresponding critical value is: 0.561

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3 years ago
Determine the area, in square centimeters, of
lapo4ka [179]

Step-by-step explanation:

quarter circle means that you just find the are and then divide it by 4.

hence,

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the answer is 50.24 cm²

hope this helps.

6 0
2 years ago
What is equal to the square root of negative 27
Pachacha [2.7K]

square root(negative 27) =

5.19615242 i

5 0
3 years ago
Part of the proceeds from a garage sale was $455 worth of $5 bills and $20 bills. If there were 6 more $5 bills than 20$ bills f
Feliz [49]

Answer:

\large \boxed{\text{17 \$20 bills and 23 \$5 bills}}

Step-by-step explanation:

               Let x = the number of $20 bills.

     Then x + 6 = the number of $5 bills  and

20x + 5(x +  6) = 455

\begin{array}{rcl}20x + 5(x + 6) & = & 455\\20x + 5x + 30 & = & 455\\25x + 30 & = & 455\\25x & = & 425\\x & = &\dfrac{425}{25}\\\\x & = &\mathbf{17}\\\end{array}

                    x = 17 = number of $20 bills

x + 6 = 17 + 6 = 23 = number of $5 bills

\text{There were }\large \boxed{\textbf{17 \$20 bills and 23 \$5 bills}}

Check:

\begin{array}{rcl}20\times17+ 5(17 + 6) & = & 455\\340 + 5\times23& = & 455\\340 + 115 & = & 455\\455 & = & 455\\\end{array}

OK.

7 0
3 years ago
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