All categories

3 years ago

Which expression can be used to model the phrase “the sum of three and a number”? 3 + x x minus 3 3 minus x x times 3

Mathematics

1 answer:

NNADVOKAT [17]3 years ago

7 0

Answer:

3x because the sum of 3 and a number is usually x

You might be interested in

What is the value of f(3) in the function f(x)=5/6x+8

natita [175]

For this case we have a function of the form $y = f (x)$ , where $f (x) = \frac {5} {6} x + 8$

We must find the value of the function when $x = 3$ , that is, we must find f (3). So:

$f (3) = \frac {5} {6} (3) + 8\\f (3) = \frac {15} {6} +8\\f (3) = \frac {5} {2} +8\\f (3) = 2.5 + 8\\f (3) = 10.5$

So $f (3) = 10.5$

Answer:

$f (3) = 10.5$

3 0

4 years ago

the center of a circle is on the line y=2x and the line x=1 is tangent to the circle at (1,6).find the center and the radius

Julli [10]

The radius and the center of the circle are 4 units and (1,2), respectively

<h3>How to determine the center and the radius?</h3>

The center of the circle is on

y = 2x and x = 1

Substitute x = 1 in y = 2x

y = 2 * 1

Evaluate

y = 2

This means that the center is

Center = (1, 2)

Also, we have the point of tangency to be:

(x, y) = (1, 6)

This point and the center have the same x-coordinate.

So, the distance between this point and the center is

d = 6 - 2

d = 4

This represents the radius

Hence, the radius and the center of the circle are 4 units and (1,2), respectively

Read more about circle equation at:

brainly.com/question/10618691

#SPJ1

6 0

2 years ago

Please help me please!!

frozen [14]

3/4 is the correct answer

3 0

3 years ago

5x²+4x+3=0 solve for x

juin [17]

Answer:

${ \underline{ \sf{x \: is \: \: \{ \frac{ - 5 + i \sqrt{35} }{10} \} } \: \: and \: \: \{ \frac{ - 5 - i \sqrt{35} }{10} \}} }$

Step-by-step explanation:

$5 {x}^{2} + 4x + 3 = 0$

from quadratic formular:

${ \sf{x = \frac{ - b± \sqrt{ {b}^{2} - 4ac } }{2a} }}$

general equation:

${ax}^{2} + bx + c = 0$

a is 5, b is 4 and c is 3:

substitute in formular:

${ \sf{x = \frac{ - 5± \sqrt{ {5}^{2} - (4 \times 5 \times 3) } }{(2 \times 5)} }} \\ \\ { \sf{x = \frac{ - 5± \sqrt{ - 35} }{10} }}$

but from complexes, i² = -1

${ \sf{x = \frac{ - 5± \sqrt{35 {i}^{2} } }{10} }} \\ \\ = { \sf{x = \frac{ - 5±i \sqrt{35} }{10} }}$

6 0

3 years ago

Write an equation and solve. 8 less than a number is 24

Elza [17]

8 less than a number can be written as

x-8

when you see the word is you should think of = sign

so the equation will be x-8=24

Now solve adding 8 to both sides.

x=24+8

x=32

4 0

3 years ago

Read 2 more answers