All categories

2 years ago

Two numbers have a difference of 4 and a sum of -8. What is their product?

1 answer:

7 0

Assume the two numbers are x and y
the difference = 4 , so x - y = 4
the sum = -8 , so x + y = -8
by solving both equations
2x = -4
x = -2
-2 + y = -8
y = -6
the two numbers are -2 and -6

You might be interested in

Determine the 15th term of the sequence -2, 4,...

Thepotemich [5.8K]

Mot enough information given.
The rule might be

-- add 6
or
-- double and add 8
or
-- square
or
-- multiply by -2 .

We need one more term to determine what the rule is for calculating the next term from the previous one.

The

7 0

2 years ago

Read 2 more answers

Solve A=p+prt for r.

Furkat [3]

A = p + prt

The above equation can be solved for “r” in such a way.

Subtract “p” from both sides;

A – p = p + prt – p

A – p = prt

Divide both sides by “p” and “t”;

A/pt – p/pt = prt/pt

A/pt – 1/t = r

r = A/pt – 1/t

3 0

2 years ago

A bird at the top of a tree looks down at a field mouse with an angle of depression of 65Á. If the field mouse is 30 meters from

Dafna11 [192]

Correct answer is 33.1 m.

Use The definition of trigonometric functions. The sine of an angle is the quotient of the opposite side and hypotenuse.

$sin{65^o}= \frac{30}{x} 
\\x= \frac{30}{sin{65^o}}
\\x=33.1 
$

3 0

2 years ago

which of the following is a point slope equation of a line with the point (-6,2) and a slope of 1/2?

wariber [46]

Answer:

y - 2 = 1/2(x + 6)

General Formulas and Concepts:

Algebra I

Point-Slope Form: y - y₁ = m(x - x₁)

x₁ - x coordinate
y₁ - y coordinate
m - slope

Step-by-step explanation:

Step 1: Define

Identify

Point (-6, 2)

Slope m = 1/2

Step 2: Find

Substitute in variables [Point-Slope Form]: y - 2 = 1/2(x - -6)
Simplify: y - 2 = 1/2(x + 6)

3 0

2 years ago

Please help!! Find the inverse of y=7x-10. Is the inverse a function?

kolezko [41]

Answer: $f^{-1}$ (x) = $\frac{x+10}{7}$

Step-by-step explanation:

To find the inverse , all we need do is to make x the subject of the formula.

y = 7x - 10

Add 10 to both sides

y + 10 = 7x

divide both sides by 7

Therefore:

x = y + 10 / 7 , that is

$f^{-1}$ (x) = $\frac{x+10}{7}$

8 0

2 years ago

Read 2 more answers