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scZoUnD [109]
3 years ago
9

Solve this quadratic equation using the quadratic formula. x2 + 8x - 5 = 0

Mathematics
1 answer:
jasenka [17]3 years ago
7 0
X^2 + 8x - 5 = 0
a = 1, b = 8, c = -5
x = ( - 8 + - sqrt(64 - 4*1*-5))/2
x = ( -8 + - sqrt(64+20))/2
x = ( -8 + - sqrt (84))/2
x = ( - 8 + - 2sqrt21))/2
x = -4 + - sqrt21
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The value of b when solving the equation 2 (6 + 12) = 16 is:
elena-s [515]

Answer:

Step-by-step explanation:

2(6+12)=16

2 X 6 +  2  X  12

12     +     24

       26  =  16

HOPE U GE5T IT

8 0
3 years ago
on the left side of the triangle, it says 10 cm, on the right side of the triangle, it says 18 cm, below the triangle, it says 1
stira [4]
Area formula for a triangle is 1/2BxH

B=15
H=10

1/2(15)= 7.5

7.5 x 10= 75

So the area is 75 square cm :)
8 0
3 years ago
The weight of an object on the moon varies directly as its weight on earth. A person who weights 150.94lb on earth weighs 25.66l
Veronika [31]

109.93 lbs

since the quantities vary directly, then

w(moon) = kw(earth ) ← ( k is the constant of variation )

to find k use the given condition

k = w( moon ) / w( earth ) = \frac{25.66}{150.94}

given w(earth) = 218.24

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8 0
3 years ago
What is 7a + 1 = 8a - (a - 1)​
leva [86]

Answer: all real numbers

Step-by-step explanation:

7a + 1 = 8a - a + 1

7a + 1 = 7a + 1

a = all real numbers

5 0
3 years ago
The difference between sixteen, and the product of seven and two
Monica [59]

Answer:

2

Step-by-step explanation:

If this product was written as an equation, it would look like this:

16 - 7 * 2

PEMDAS states that multiplication comes before addition. So, the first step in the equation is to multiply 7 and 2.

7 * 2 = 14

Now, the equation looks like:

16 - 14

All we need to do now is subtract 14 from 16.

16 - 14 = 2

So, the final answer is 2.

6 0
3 years ago
Read 2 more answers
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