3 years ago

Can someone please help me?

Mathematics

1 answer:

lana [24]3 years ago

3 0

Answer:

22 lawns could be mowed as it takes 1.5 hours per lawn.

If they sold six lizards they would earn $71.82

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1. A bag of marbles has 15 marbles in it. there are 7 Red marbles and 8 Green marbles. What is the ratio probability of pulling

elixir [45]

Answer:

pulling red 7:15

green 8:15

54% chance of pulling green because 8 is 54% of 15

3 0

4 years ago

Read 2 more answers

A single card is drawn at random from a standard 52 card deck. Work out in its simplest

larisa [96]

Answer:

1/52

Step-by-step explanation:

8 0

3 years ago

If F(x) =6x, Find F(4) <br> F(3)=

soldi70 [24.7K]

Answer:

F(4)=24 and F(3)=18

Step-by-step explanation:

Plug the 4 and the 3 in to the x's and multiply them by 6

6 0

3 years ago

lisa sold 81 magazine subscriptions which is was 27% of her class fundraising goal.how many magazine subscripitons does her clas

hodyreva [135]

Set up a proportion.

27% = 0.27

81/0.27 = x/1

Multiply 1 to both sides:

x = (81 * 1)/0.27

Multiply:

x = 81/0.27

Divide:

x = 300

So they hope to sell 300 magazine subscriptions.

7 0

3 years ago

Solve for x <br> Xsquare+ 4x+45=0

I am Lyosha [343]

For this case we must solve the following quadratic equation:

$x ^ 2 + 4x + 45 = 0$

Where:

$a = 1\\b = 4\\c = 45$

The solution will be given by:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

Substituting the values we have:

$x = \frac {-4 \pm \sqrt {4 ^ 2-4 (1) (45)}} {2 (1)}\\x = \frac {-4 \pm \sqrt {16-180}} {2}\\x = \frac {-4 \pm \sqrt {-164}} {2}$

By definition we have to:

$i ^ 2 = -1$

So:

$x = \frac {-4 \pm \sqrt {164i ^ 2}} {2}\\x = \frac {-4 \pm i \sqrt {164}} {2}\\x = \frac {-4 \pm i \sqrt {2 ^ 2 * 41}} {2}\\x = \frac {-4 \pm2i \sqrt {41}} {2}\\x = -2 \pm i \sqrt {41}$

Thus, we have two complex roots:

$x_ {1} = - 2 + i \sqrt {41}\\x_ {2} = - 2-i \sqrt {41}$

Answer:

$x_ {1} = - 2 + i \sqrt {41}\\x_ {2} = - 2-i \sqrt {41}$

6 0

4 years ago