All categories

3 years ago

I am thinking of a number x. what algebraic expression represents 7 less than three times this number?

Mathematics

1 answer:

sammy [17]3 years ago

8 0

Step-by-step explanation:

Answer: 3x-7

Explanation: x times 3

(3x)

subtracted by 7

(3x-7)

Is this what you are looking for?

You might be interested in

The formula for the resistance, R, of a conductor with voltage, V, and current , I , is R= V/I. Solve for V.

borishaifa [10]

Answer:

T+V/I

Step-by-step explanation:

multiply both sides by I to get rid of fractions ti=V

7 0

2 years ago

Read 2 more answers

write a story problem that can be solved by finding the sum of 506,211 and 424,809. then solve the problem

Amiraneli [1.4K]

Story Problem

Mr. Bill Gates bought a house in Italy for $\$506,211$ and a house in Canada for $\$424,809$ . What is the total cost of the two houses?

we know that

The total cost is the sum of the cost each house

$\$506,211+\$424,809=\$931,020$

therefore

the answer is

The total cost is $\$931,020$

7 0

2 years ago

Read 2 more answers

Graph f(x) =-2x^+16x-30 by factoring to find the solutions, then find the coordinates of the vertex, and the axis of symmetry. I

fredd [130]

Answer:

Observe attached image

Function zeros:

(3, 0), (5, 0)

Vertex:

(4, 2)

Axis of symmetry:

 $x =4$ 

Step-by-step explanation:

First factorize the function

$f (x) = -2x ^ 2 + 16x-30$

Take -2 as a common factor.

$-2(x ^ 2 -8x +15)$

Now factor the expression $x ^ 2 -8x +15$

You must find two numbers that when you add them, obtain the result -8 and multiplying those numbers results in 15.

These numbers are -5 and -3

Then we can factor the expression in the following way:

$f (x) = -2(x-5)(x-3)$

The quadratic function cuts the x-axis at x = 3 and at x = 5.

Now we find the coordinates of the vertex.

For a function of the form $ax ^ 2 + bx + c$ the x coordinate of its vertex is:

$x = \frac{-b}{2a}$

In the function $f (x) = -2x ^ 2 + 16x-30$

$a = -2\\b = 16\\c = 30$

Then the vertice is:

$x = \frac{-16}{2(-2)}\\\\x = 4$

The y coordinate of the symmetry axis is

$y = f (4) = -2 (4) ^ 2 +16 (4) -30\\\\y = 2$

The axis of symmetry is a vertical line that cuts the parabola in two equal halves. This axis of symmetry always passes through the vertex.

Then the axis of symmetry is the line

$x = 4$

The solutions and the vertice written as ordered pairs are:

Function zeros:

(3, 0), (5, 0)

Vertex:

(4, 2)

6 0

2 years ago

In problems 1-3, a and b are legs and c is the hypotenuse. Find the missing side length of the

Readme [11.4K]

Answer:

1. b=39.497

2. c=3.606

3. a=18.974

Step-by-step explanation:

41^2-11^2=b^2

1681-121=b^2

b^=1560

b=39.497

2^2+3^2=c^2

4+9=c^2

c^2=13

c=3.606

21^2-9^9=a^2

441-81=a^2

a^2=360

a=18.974

4 0

2 years ago

The equation that represents the canned goods order is 24x + 64y = 384, where x = number of minutes spent producing fruit cans,

Lubov Fominskaja [6]

So wee need to find x

4 0

3 years ago

Read 2 more answers