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3 years ago

Write an expression for the situation Number of minutes in h hours

Mathematics

1 answer:

Vesnalui [34]3 years ago

5 0

Since there are 60 minutes in 1 hour, the expression would be 60h.

For example, if you want to know how many minutes are in 3 hours, just substitute 3 into h: $60h$ --> $60(3) = 180$ minutes

Hope this helps! :)

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Solve 3x2 = −12x − 15. x = −4 ± 2i x = −4 ± i x = −2 ± 2i x = −2 ± i

diamong [38]

ANSWER

$x = - 2 \pm i$

EXPLANATION

We use the method of completing the squares.

The equation is
$3 {x}^{2} = - 12x - 15$

We rewrite the above equation to obtain;

$3 {x}^{2} + 12x = - 15$

We divide through by 3 to obtain;

${x}^{2} + 4x = - 5$

We add half the coefficient of
$x$

to both sides of the equation to get,

${x}^{2} + 4x + {2}^{2} = - 5 + {2}^{2}$

The right hand side is now a perfect square.

${(x + 2)}^{2} = - 1$

We now take square root of both sides to get;

$x + 2 = \pm \sqrt{ - 1}$

We add -2 to both sides,

$x = - 2 \pm \sqrt{ - 1}$

We simplify to obtain,

$x = - 2 \pm i$

3 0

3 years ago

Esteban is shopping for a bookshelf. He has 58 non-fiction books and 145 fiction books. He wants each shelf to have the same num

emmasim [6.3K]

Answer:

Step-by-step explanation:

Criteria:

• same number of books on each shelf

⇒find a number that divides 58 and 145

• greatest number of books on each shelf

⇒find the greatest number that divides 58 and 145

Find the GCF of 58 and 145.

58 = 2 ⋅ 29

145 = 5 ⋅ 29The GCF of 58 and 145 is 29.

Each shelf will contain 29 books.

There are 203 total books (because 58 + 145 = 203).

Divide 203 by 29 to find the number of shelves there should be.

203 / 29 = 7

Therefore, there will be 7 shelves.

5 0

2 years ago

How many solutions does this equation have

Stells [14]

Answer:

I m not sure, I can't see

Step-by-step explanation:

8 0

3 years ago

Solve the inequality. y−5≥8

mixas84 [53]

Answer:

Y is less than or equal to 13

Step-by-step explanation:

3 0

3 years ago

What is the slope of the line represented y= 5x -7

Wittaler [7]

The slope is 5. This is because the coefficient of x is the slope of a line.

7 0

3 years ago

Read 2 more answers