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3 years ago

What number should be placed In the box.

Mathematics

2 answers:

Anni [7]3 years ago

5 0

Answer:

Step-by-step explanation:

14 * 45 = 630

630 is your answer

babunello [35]3 years ago

3 0

14 * 45 = 630

The number that should be put in the box is 630

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Hurry: Only 5 mins to answer! When Prachisha checked out they charged her sales tax of 7.25%. How much did she pay for the items

ella [17]

101.15

Explanation:

140 x 7.25% = 10.15

140 x 35% = 49

Then we add the tax and subtract the sale :

140 + 10.15 - 49 = 101.15$

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3 years ago

Solve the equation and enter its solution set below. Enter the solutions in solution set notation separated by a comma and in or

kherson [118]

Answer:

5/6, 7

Step-by-step explanation:

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3 years ago

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kolbaska11 [484]

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3 years ago

One number is 2 more than 3 times another. Their sum is 22. Find the numbers.

ivolga24 [154]

Make a system of equations.

$\sf~x=3y+2$
$\sf~x+y=22$

Re-arrange the 2nd equation:

$\sf~x+y=22$

Subtract y to both sides:

$\sf~x=-y+22$

Plug in -y + 22 for 'x' in the first equation.

$\sf~x=3y+2$

$\sf~-y+22=3y+2$

Subtract 3y to both sides:

$\sf~-4y+22=2$

Subtract 22 to both sides:

$\sf~-4y=-20$

Divide -4 to both sides:

$\sf~y=\boxed{\sf5}$

Plug this into any of the two equations to find 'x':

$\sf~x+y=22$

$\sf~x+5=22$

Subtract 5 to both sides:

$\sf~x=\boxed{\sf17}$

So one of the numbers is 5 and one of them is 17.

6 0

3 years ago

HELP !! ASAP !!

Sedaia [141]

Answer:

The roots are;

x = (2 + i)/5 or (2-i)/5

where the term i is the complex number representing the square root of -1

Step-by-step explanation:

Here, we want to use the completing the square method to solve the quadratic equation;

f(x) = -5x^2 + 4x -1

Set the function to zero

0 = -5x^2 + 4x - 1

So;

-5x^2 + 4x = 1

divide through by the coefficient of x which is -5

x^2 - 4/5x = -1/5

We now take half of the coefficient of x and square it

= -2/5^2 = 4/25

add it to both sides

x^2 - 4x/5 + 4/25= -1/5 + 4/25

(x- 2/5)^2 = -1/5 + 4/25

(x - 2/5)^2 = -1/25

Take the square root of both sides

x - 2/5 = √( -1/25

x - 2/5 = +i/5 or -i/5

x = 2/5 + i/5 or 2/5 - i/5

7 0

3 years ago