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Andru [333]
3 years ago
11

1 point 5) Solve by using the quadratic formula 8x² = 15 - 14x

Mathematics
1 answer:
kykrilka [37]3 years ago
6 0
<h3>I'll teach you how to solve 8x² = 15 - 14x</h3>

----------------------------------------------------

8x² = 15 - 14x

Add 14x to both sides:

8x^2 +14x =15-14x+14x

Simplify:

8x^2 +14x =15

Subtract 15 from both sides:

8x^2+14x-15 = 15-15

SImplify:

8x^2+14x-15 = 0

Solve with the quadratic formula:

x= \frac{-14+ \sqrt{14^2-4*8(1-15)} }{2*8}  = 3/4

x= \frac{-14+ \sqrt{14^2-4*8(1-15)} }{2*8}  = -5/2

The solutions to the quadratic formula are:

x= 3/4, x=-5/2

Your Answer Is x= 3/4, x=-5/2

plz mark me as brainliest :)

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A restaurant has 4 appetizers, 5 entrees and 2 desserts. How many different meal combinations could you order?
vovangra [49]

Step-by-step explanation:

1.) Firstly, you need to count out how many things there are. 4 app, 5 entrees, 2 desserts. This makes 11 different things

2.) for 11 numbers there can be 9 ways for each number for 1st nine places since 0 can't be the fist figure and next two are reciprocated from 10 numbers. Therefore 10!/2!

3.)So 99 combinations have 10!/2! Permutations hence total ways are 99*10!/2!

6 0
4 years ago
A recipe calls for 1 1/4 cups of flour, 3/4 cup of white sugar, and 1/3 cup of brown sugar. The recipe makes 4 servings. How man
sleet_krkn [62]

Answer:

Cups of flour 5/16

Cups of sugar 3/16

5/8 more cups of flour we need for 6 servings

Step-by-step explanation:

Cups of flour

We need to divide the total of flour (1 1/4) in the total of servings (4)

=(1 1/4)/4

=5/16 cups of flour for servings

Cups of sugar

We need to divide the total of sugar (3/4) in the total of servings (4)

=(3/4)/4

=3/16 cups of sugar for servings

If the recipe is for 6 servings

You need to add more flour and sugar to complete 6 servings

1 1/4 flour=4 servings

x flour=6 servings

(1 1/4 flour*6 serving)/4 servings=x flour

x flour= 15/8 cups of flour

The difference

First 1 1/4 cups

Then 1 7/8

More cups of flour=5/8

8 0
4 years ago
An open rectangular box with a square bottom must have a surface area of A square inches. Write a formula for the volume of the
skelet666 [1.2K]
The surface area of the box is being referred to as A
The surface area will be the sum of the four rectangular sides' areas and the base area.
Base area = x²
Rectangular side area = xh
A = x² + 4xh
Volume is, as you said,
V = x²h
Lets substitute h from the formula of A to obtain A in our final answer. Substituting x is possible, but more difficult
(A - x²)/4x = h
V = (x²) * (A - x²)/4x
V = (Ax - x³)/4

5 0
4 years ago
Read 2 more answers
Find the common factor of the given terms 6a^3 b^2 c, 24ab^3 c^4 , 12 abc​
Pachacha [2.7K]

Answer:

Step-by-step explanation:

the way you do it is by checking the letter in every term and seeing which instance has the lowest of that letter (for now pretend the regular numbers, in this case 6 24 and 12, aren't there). Once you do that you'll see that the last term has each variable (letter) to the power of one, so that will be the common factor for the letters. Next, look at the real numbers, and you see that the lowest number each can be divided by is 6. so you have 6abc. I'm tired and I think I explained it in a confusing way, so if you still have questions search up "how to find the greatest common factor in polynomials"

3 0
3 years ago
What is the positive solution to the equation 4x^2 + 12x = 135
serg [7]

Answer:

You can't do that is an error if you want to do that you would get it wrong but the only way to do that is 4x2+12x135 which equals 1628

Step-by-step explanation:

I multplyed 4x2 first then 12x135 then added both of them together which gave me 1628

3 0
4 years ago
Read 2 more answers
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