MATHEMATICS HIGH SCHOOL

PLEASE HELPPPPPPPP ASAPPP!!!
Solve for x.

Answers

Answer 1

Answer:

b=cy-x

please forgive the me for the way I typed it

y=x/c+b

y=x+b/c

cross multiply

x+b=cy

b=cy-x

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Is relation t a function? Is the inverse of relation t a function? Relation t:

x; 0 , 2 , 4 , 6
y; -10 , -1 , 4 , 8

Relation t is not a function. The inverse of relation t is not a function.

Relation t is a function. The inverse of relation t is a function.

Relation t is a function. The inverse of relation t is not a function.

Relation t is not a function. The inverse of relation t is a function.

Answers

A set of points can be classified as a function using the vertical test rule which tells that a function should pass a vertical test such that no to points lie on the same vertical line. This means no two points should have the same x. In this case, the set of points project a function as well as its inverse. Hence the answer is B.

You are working as a clinical chemist in charge of the testing of blood samples. You are required to mix a solution of sodium chloride with water in the ratio of 2:5. Starting with 780ml of the sodium chloride solution, how much water needs to be added? Give your answer in standard form to an appropriate number of significant figures.

Answers

1,950 ml of water should be added to 780 ml of sodium chloride to maintain the ratio of 2:5

Given:
Ratio of sodium chloride to water 2:5
sodium chloride = 780 ml
water = ?

proportionality a:b = c:d where ad = bc

a = 2 ; b = 5 ; c = 780 ml ; d = x

2:5 = 780:x
2x = 780*5
2x = 3900
x = 3900/2
x = 1950 ml of water.

What are the formulas for COS, TAN, and SIN?

Answers

I'm guessing that you don't really want the formulas. I think what you actually want
is the definitions of those functions of an acute angle when it's in a right triangle.

Cosine = (adjacent side) / (hypotenuse)

Tangent = (opposite side) / (adjacent side)

Sine = (opposite side) / (hypotenuse)

Tell me if I'm wrong, and I'll find some formulas for you.

*****Write a polynomial using the roots -3,5i. PLEASE HELP IM SO LOST!!!

Answers

The polynomial $(x-a)$ has a unique root, $a$ , for any $a$ .

Hence $(x+3)(x-5i)$ is a polynomial with roots $-3$ and $5i$

For the values a = 2.9 which is a leg of a right triangle, and value c = 4.2, which is the hypotenuse, find the length of the other leg, b, to the nearest tenth.A. 2.9

B. 3.0

C. 2.8

D. 1.3

Answers

Given:
a = 2.9
c = 4.2
b = ?

Right triangle. Use Pythagorean Theorem.
a² + b² = c²
b² = c² - a²
b² = 4.2² - 2.9²
b² = 17.64 - 8.41
b² = 9.23
b = √9.23
b = 3.04 Choice B.

The length of the other leg is 3.0

The right one is B) 3.0, as you know $a^(2) + b^(2) = c^2$ due to Pythagoras' theorem. So $b= √(c^2 - a^2)$ . Put the right numbers into the formula and you get 3.0. That is B.