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Leno4ka [110]
3 years ago
7

Determine the value of y, if x is 7. y = x2 - 1

Mathematics
2 answers:
Savatey [412]3 years ago
7 0
13 because if you plug in 7 y=7(2)-1 then do 7x2 and then it would be 14-1 so 13
ddd [48]3 years ago
4 0

Answer:

13

Step-by-step explanation:

If x is 7, then 7 * 2 = 13, and 14 - 1 = 13.

Hope that this helps!

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Find the circumference of a circle that has an area of 452.16 square meters. (Use 3.1416 as the value of π.)
laila [671]
\bf \textit{area of a circle}\\\\
A=\pi r^2\quad 
\begin{cases}
r=radius\\
-----\\
A=452.16
\end{cases}\implies 452.16=\pi r^2\implies \cfrac{452.16}{\pi }=r^2
\\\\\\
\boxed{\sqrt{\cfrac{452.16}{\pi }}=r}\\\\
-------------------------------\\\\
\textit{circumference of a circle}\\\\
C=2\pi r\qquad \qquad \implies C=2\pi \left( \boxed{\sqrt{\cfrac{452.16}{\pi }}} \right)

so, is just that product, recall to use "<span>3.1416 as the value of π".</span>
7 0
3 years ago
What is this number in standard form? <br> (8×100)+(4×1)+(6×1100)+(3×11,000)
Korvikt [17]

Answer:

40404

Step-by-step explanation:

is this helpful????

5 0
2 years ago
Read 2 more answers
Help! answer options included
lawyer [7]

Answer:

Y = [-6  6 6 -6]

Step-by-step explanation:

From the given matrices

If X - 2Y  = Z

b - 2c = a ... 1

a -2d = c ...2

4+2a = 16.... 3

a + 2b = b .... 4

From3 ;

2a = 16-4

2a = 12

a = 6

From 4;

a + 2b - b = 0

a+b = 0

a = -b

6 = -b

b  = -6

From1;

b - 2c = a

-6 - 2c = 6

-2c = 12

c = -6

also

a - 2d = c

6-2d = -6

-2d = -6-6

-2d = -12

d = 6

Hence the matrices Y = [-6  6 6 -6]

4 0
2 years ago
∠C and ​ ∠D ​ are vertical angles with m∠C=−x+26 and m∠D=2x−10 .<br><br><br><br> What is m∠D ?
grin007 [14]

Answer:

the correct answer is 14

Step-by-step explanation:

6 0
3 years ago
Over the summer, for every 12 okra seeds Dana planted, 7 grew into plants. If he planted 120 okra seeds, how many grew into plan
Ipatiy [6.2K]
The answer is 70 because 

6 0
3 years ago
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