All categories

3 years ago

Use the quadratic formula to solve x2 + 7x + 8 = 0. Estimate irrational solutions to the nearest tenth.

1 answer:

6 0

x2 + 7x + 8
a = 1
b = 7
c = 8
x = [-b +-sq root (b^2 -4ac)] / 2a
x = [-7 +- sq root (49 -4*1*8)] / 2*1
x = [-7 +- sq root (49 -32)] / 2
x = [-7 +sq root (17)] / 2

x1 = [-7 +sq root (17)] / 2
x2 = [-7 -sq root (17)] / 2

x1 = -1.4384
x2 = -5.5616

You might be interested in

Julio paid $27 to rent a scooter for 4 hours. Elsie paid $42 for 7 hour. Assuming the relationship is linear, write an equation

Bezzdna [24]

Answer:

The answer is B.) mate

8 0

2 years ago

Ayo need help

sweet-ann [11.9K]

Is there more information? Because it’s impossible to tell without an average size for the items

5 0

2 years ago

Read 2 more answers

Prove that the following four points will form a rectangle when connected in order

Lemur [1.5K]

Answer:

Step-by-step explanation:

If the diagonals of the rectangle are congruent,

AC = BD

By using formula to calculate the distance between two points,

Distance between two points = $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Distance between A(0, -3) and C(2, 8),

AC = $\sqrt{(8+3)^2+(2-0)^2}$

= $\sqrt{125}$

= $5\sqrt{5}$

Similarly, distance between two points B(-4, 0) and D(6, 5),

BD = $\sqrt{(5-0)^2+(6+4)^2}$

= $\sqrt{125}$

= $5\sqrt{5}$

Therefore, both the diagonals are congruent.

Hence, given quadrilateral ABCD is a rectangle.

8 0

2 years ago

Write down the equation of a line parallel to y = 3x + 2

vichka [17]

Answer:

y= 3x - 15

Step-by-step explanation:

parallel lines have the same slope, but different y intercepts

8 0

2 years ago

Becky is 7 year older than half of Bryan's age. If Bryan is 36 how old is becky ?

Tanya [424]

Answer: Im going to guess 25

Step-by-step explanation: bryan is 36 half of 36 is 18 and becky is 7 years older than 18 which half so you would do 18+7=25 there is your answer.

I THINK DONT QUOTE ME ON THAT ANSWER

8 0

3 years ago