MATHEMATICS MIDDLE SCHOOL

How do I do this,I can't seem to get the answer
How do I do this,I can't seem to get the - 1

Answers

Answer 1
Answer: 5/12 k=15/16
k=(15*12) / (16 * 5)
K=180/80=9/4

Answer: K=9/4

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What are the solutions of 4x^2+16x=9

Answers

Answer:

Step-by-step explanation:

Ethan, this is a quadratic equation.  We should rewrite this in standard quadratic form:  4x^2 + 16x - 9 = 0.  Let's use the quadratic formula approach to solve this:

The coefficients of x are a = 4, b = 16 and c = -9.  Thus, the discriminant is

b^2 - 4ac, or 16^2 - 4(4)(-9), or 256 - 144, or 112.

The two solutions are real and are as follows:

       -16 ± √112            -16 ± √(16*7)         -16 ± 4√7

x = -------------------   = ----------------------- = -----------------

            2(4)                            8                        8

Or, after simplification,

       -4 ± √7

x = --------------

             2

Increase £168 by 17.5%

Answers

100% = 168

1% = 1.68

17.5% =

         1.68 x 17.5 = 29.4

168 + 29.4 = 197.4 which is the increased amount in pounds

A coral reef is losing 7% of its area annually. Create a table of percentage calculations for 10 years. If the coral reef starts out with 14,000 square feet, how much is left after 9 years?

Answers

Coral in square feet | Year
14,000 | start
13,020 | 1st year
12,108.6 | 2nd year
11,261 | 3rd year
10,472.73 | 4th year
9,739.64 | 5th year
9,057.87 | 6th year
8,423.82 | 7th year
7,834.15 | 8th year
7,285.76 | 9th year
6,775.76 | 10th year

If a triangle has one angle that measures 51° and one angle that measures 39°, what kind of triangle is it?

Answers

it is a acute triangles because the degrees are less than 90 degrees
The triangle is a acute triangle because the angles are less than 90.

How do I divide a decimal

Answers

1. if the derisive is not a whole number, move decimal to the right to make it a whole number and move decimal point in dividend the same number of places
 2. divide as usual
3. put decimal right under the decimal in the dividend

Brand a cereal contains 10 cups of cereal. how many more cups of cereal are in brand b cereal

Answers

as I don't know enough info I will say how to figure it out,
so you get the amount of cereal in a [eg 40] then you divide it by 10 you get [4] each cup is worth [4] then you divide b [eg 56] by [4] giving you [14] so you get [4]
more cups of cereal in b.
i am presuming thats the info you get in the question and if it is that is how you answer it if not well its your fault for not providing enough info

Brand B has 30% more cereal. :)
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