What is the solution to the quadratic equation 8m^2+7m-15=-7 ?

Answers

Answer 1

Answer: make equal to zero
add7 both sides
8m^2+7m-8=0
quadratic fomrula

if you have
ax^2+bx+c=0
x= $\frac{-b+/- \sqrt{b^(2)-4ac} }{2a}$

8m^2+7m-8=0
a=8
b=7
c=-8

x= $\frac{-7+/- \sqrt{7^(2)-4(8)(-8)} }{2(8)}$
x= $(-7+/- √(49+256) )/(16)$
x= $(-7+/- √(305) )/(16)$

x= $(-7+ √(305) )/(16)$ or x= $(-7- √(305) )/(16)$

aprox
x=-1.52902 or 0.654016

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Given the function f(x) = 2(x + 8), find x if f(x) = 12.A) 2
B) 40
C) −2
D) 14

Answers

Answer:

f(x)= 2 × (x+8)------(1)

f(x)=12---------(2)

Equating (1) and (2)

⇒2×(x+8)=12

⇒Using distributive property of multiplication with respect to Addition

⇒2 x +16=12

⇒2 x+16-16=12 -16-----[Subtracting 16 from both sides]

⇒2 x= -4

Dividing by , 2 ,on both sides

⇒x= -2

Option C: -2

f(x) = 2(x+8)
12 = 2x + 16
2x = 12 - 16
2x = -4
x = -2

Show that 4(a + 3) - 3(a - 2) = a + 18

Answers

4(a + 3) - 3(a - 2) = a + 18 4a+12-3a+6=a+18 a+18=a+18 true

In how many different ways can 3 identical green shirts and 3 identical red shirts be distributed among 6 children such that each child receives a shirt

Answers

Answer:

Total number of ways will be 20

Step-by-step explanation:

We have given three identical green shirts and three identical red shirts

So total number of shirts = 3+3 = 5

We have to distribute these shirts to 6 children so that each children got one shirt

Number of ways will be equal to $=(6!)/(3!3!)=20$ ( Here we divide by 3!3! because three green shirts and 3 red shirts are identical )

Which expression has a value of 1/6

Answers

Answer:

There are several expressions that have a value of 1/6. Here are a few examples:

- 2/12

- 3/18

- 4/24

- 5/30

- 10/60

These expressions all equal 1/6 when simplified.

How do you find midpoint for geometry

Answers

Use this formula (x1+x2 over 2, y1+y2 over 2)

Subtract 5X squared+2X -11 from 3X squared +8X -7

Answers

Subtraction of polynomials are done just as normal subtraction, but you can only subtract those with the same variables and exponents. This is shown below:

3x^2 + 8x - 7
- 5x^2 + 2x - 11
----------------------
-2x^2 + 6x + 4

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