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3 years ago

What is the difference between 4x and x4? evaluate both of these expressions when x = 2

Mathematics

1 answer:

riadik2000 [5.3K]3 years ago

7 0

Answer:

There is no difference. 4x and x4 are both meaning 4 times x and x times 4

Step-by-step explanation:

If x = 2, then 4 x 2 = 8.

x4 is the same thing

2 x 4 = 8

Note:

When the numbers are there together, without an operation, it means multiplication.

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What are the coordinates of the x-intercepts of the parabola y = x² - 8x + 15?

tamaranim1 [39]

Answer:

(3, 0) and (5, 0)

Step-by-step explanation:

we have

$y=x^{2}-8x+15$

we know that

The x-intercepts are the values of x when the value of y is equal to zero

For y=0

$x^{2}-8x+15=0$

The formula to solve a quadratic equation of the form

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

is equal to

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

in this problem we have

$x^{2}-8x+15=0$

$a=1\\b=-8\\c=15$

substitute in the formula

$x=\frac{-(-8)\pm\sqrt{-8^{2}-4(1)(15)}} {2(1)}$

$x=\frac{8\pm\sqrt{4}} {2}$

$x=\frac{8\pm2} {2}$

$x=\frac{8+2} {2}=5$

$x=\frac{8-2} {2}=3$

x=3, x=5

therefore

The x-intercepts are (3,0) and (5,0)

4 0

2 years ago

What is 400000, 13000, 1100, 4 ones in standard form

Lesechka [4]

413,114

i think... lol

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2 years ago

A game at the fair involves ping-pong balls numbered 1 to 18. You can win a prize if you correctly choose the 5 numbers that are

torisob [31]

Answer: 0.014

Step-by-step explanation: 5 divided by 18!

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3 years ago

What is 0.64 as a fraction in lowest terms

crimeas [40]

$0.64\to two\ digits\ after\ the\ decimal\ point\ therefore\ are\ hundredths\\\\0.64=\frac{64}{100}=\frac{64:4}{100:4}=\boxed{\frac{16}{25}}$

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3 years ago

Read 2 more answers

Solve the graph to find

Juliette [100K]

Answer:

Step-by-step explanation:

x=3 x=2. x=1

y=1 *3 y=1 *2. y=1 *1

y=1 y=1. y=1

(3,1). (2,1) (1,1)

‘The others are the same. Probably you can use a calculator too

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3 years ago