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2 years ago

Jill has a small treasure box

Mathematics

1 answer:

zmey [24]2 years ago

4 0

Jill has a small treasure box
=small treasure box in possession of jill

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Evaluate the expression 7x2y, when x = 5 and y = 3

zhuklara [117]

Simple 41
7(5)2(3)
35+6=41

8 0

3 years ago

Select the two values of x that are roots of this equation.<br>x + 2x - 6 = 0

VLD [36.1K]

For this case we must solve the following quadratic equation:

$x ^ 2 + 2x-6 = 0$

Where:

$a = 1\\b = 2\\c = -6$

The solution is given by:

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

Substituting:

$x = \frac {-2 \pm \sqrt {2 ^ 2-4 (1) (- 6)}} {2 (1)}\\x = \frac {-2 \pm \sqrt {4 + 24}} {2}\\x = \frac {-2 \pm \sqrt {28}} {2}\\x = \frac {-2 \pm \sqrt {2 ^ 2 * 7}} {2}\\x = \frac {-2 \pm2 \sqrt {7}} {2}\\x = -1 \pm \sqrt {7}$

Thus, we have two roots:

$x_ {1} = - 1+ \sqrt {7}\\x_ {2} = - 1- \sqrt {7}$

ANswer:

$x_ {1} = - 1+ \sqrt {7}\\x_ {2} = - 1- \sqrt {7}$

8 0

3 years ago

Plz help with 4,5 plz

Mice21 [21]

Answer:

130 quarters, 9 candies

Step-by-step explanation:

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3 years ago

The number of chocolates sold can be determined by the equation: P=$.63c, where P is the price and c is the number of chocolates

balu736 [363]

Answer:

p = price

0.63 = price of each piece of chocolate

c = number of pieces of chocolate

just multilply the number of pieces of chocolate by 0.63 to get the total price

Step-by-step explanation:

5 0

4 years ago

Read 2 more answers

In a pet shop, there are 15 kittens and 20 puppies. 25 of the kittens and puppies have beige fur. Ten of these beige fur animals

nadya68 [22]

This is the theory of probability. We are required to calculate the probability that an animal picked at random is a beige fur kitten given that there are 15 kittens and 20 puppies and the number of beige fur kittens and puppies is 25.
P(picking a kitten)=(number of kittens)/(total number of animals)
=15/35
=3/7
probability of an animal being beige fur is;
25/35
=5/7
The probability that the kitten selected is a beige fur will be:
3/7*5/7
= 15/49

8 0

3 years ago