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Alenkasestr [34]
3 years ago
8

Evaluate each expression using the order of operations (4-7)^2-6(7)+20

Mathematics
1 answer:
LekaFEV [45]3 years ago
3 0

The anwser would be -13

Step-by-step explanation:

PARENTHESIS

EXPONENTS

MULTIPLICATION

DIVISION

ADDITION

SUBTRACTION

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The square root of x minus two plus 8 equals x
FrozenT [24]

Step-by-step explanation:

\sqrt{x - 2 + 8}  =  \sqrt{x + 6}  = x

{( \sqrt{x + 6} })^{2}  =  {x}^{2}

x + 6 =  {x}^{2}

{x}^{2}  - x  -  6 = 0

(x - 3)(x + 2) = 0

x = 3 or x = -2 we dont use the (-2) because we have a sqrt

So x =3

6 0
3 years ago
A baseball is hit upward from a height of
jeyben [28]

Answer:

99

Step-by-step explanation:

4 0
3 years ago
Which equation below has the same solution as 1/2x - 1 = 29
lina2011 [118]

Answer:

x=60

Step-by-step explanation:

  • .5x-1=29
  • .5x=30
  • x=60

Pick whichever equation where x=60 is true. I cannot see the other equations

4 0
4 years ago
5(5t + 1) = 25t-7<br> Can someone help me with this solution??
masha68 [24]
Firstly you multiply 5 with everything in the brackets on the left side of = . and than you put t on the left side and change sign (if it was + then its going to be -) and numbers on right side and do the same with signs. then just calculate the rest

5(5t +1) = 25t - 7
25t + 5 = 25t - 7
25t - 25t = -7 + 5
0=-2
the statement is false
7 0
4 years ago
What is the average rate of change of y with respect to x over the interval [-2, 6] for the function y = 5x 2?
PolarNik [594]
The rate of change for the points (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1)
given
y=5x^2 and find the slope between x=-2 and x=6

y=6(-2)^2=6(4)=24
y=6(6)^2=6(36)=216

(-2,24)
(6,216)

slope=(216-24)/(6-(-2))=(192)/(6+2)=192/8=96/8=48/4=24/2=12
the rate of change is 12
3 0
3 years ago
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