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quester [9]
3 years ago
15

7 Solve the equation x^2 - 8x + 15 = 0.

Mathematics
2 answers:
aleksandr82 [10.1K]3 years ago
6 0

Answer:

x = -5

Evidence to support reasoning:

Oksanka [162]3 years ago
3 0

Answer:

x=5   x=3

Step-by-step explanation:

x^2 - 8x + 15 = 0

Factor

What 2 numbers multiply to 15 and add to -8

-5*-3 = 15

-5-3 = -8

(x-5)(x-3) =0

Using the zero product property

x-5 =0    x-3 =0

x=5   x=3

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Questions 1 . 2 . 3 . 4
jolli1 [7]
1.
A.add=12
B. subtract=7
C. subtract= -4
D .add=9
E. subtract=2
F. subtract= -2
G. add= -14
H. subtract= -1

2.
A.1
B.13
C.5
D.-1
E.54
F.40
G.40
H.-3

3.
A.-24
B. 24
C. -32
D. 30
E. -60
F. -40
6 0
3 years ago
Write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of the gi
Sunny_sXe [5.5K]
Y=-x
-2= -(2) That is right
8 0
2 years ago
Read 2 more answers
Y+4=1/2(x−2) rewrite in slope intercept form<br><br>1/2 is a fraction
Trava [24]

Answer:

y= 1/2x -5

Step-by-step explanation:

First, you multiply 1/2 with x, and 1/2 with -2, which then makes the equation

y+4=1/2x -1

then, you have to subtract 4 from both sides of the equation and combine -1 and -4, which gets you -5.

Then the equation turns out to be

y=1/2x-5

8 0
3 years ago
A cannon ball is launched at 6 feet per second from the top of a platform 12 feet above the ground.
AleksAgata [21]
A.) y = ut - 1/2gt^2 + 12
y = 6t - 1/2(9.8)t^2 + 12
y = 6t - 4.9t^2 + 12

b.) The y-intercept is 12

c.) The y-intercept represent the height of the ball at time t = 0

d.) At the time the ball reaches the ground, y = 0
-4.9t^2 + 6t + 12 = 0
t = 2.29 seconds
Therefore, it took the ball 2.29 seconds to reach the ground.
7 0
3 years ago
Lesson Posttest
stepladder [879]

Answer:

1

Step-by-step explanation:

Probability = number of fruit type/total number of fruit. Total number of fruit = 5 + 9 + 5 = 19.

The probability of drawing an apple is P(apple) = number of apples/total number of fruit = 5/19.

The probability of drawing a peach is P(peach) = number of peaches/total number of fruit = 9/19

The probability of drawing an apple is P(orange) = number of oranges/total number of fruit = 5/19

The probability of drawing either an apple, peach or orange at the first draw of fruit from the bag is

P(apple or peach or orange) =  P(apple) + P(peach) + P(orange)

                                               = 5/19 + 9/19 + 5/19

                                               = (5 + 9 + 5)/19

                                               = 19/19

                                               = 1

3 0
3 years ago
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