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3 years ago

Please still help her (see the picture)

Mathematics

1 answer:

I am Lyosha [343]3 years ago

5 0

#2.
a. 4000
b. 640000
c. 53
d. 5300
e. 6072
f. 607200
g. 0.949
h. 0.094

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6x – 7y = 16 2x + 7y = 24 (2, 1) (2, 0) (5, 2) (4, –5)

White raven [17]

6x – 7y = 16
2x + 7y = 24

This system is easily solvable by the elimination method as the y-terms are opposites of each other. You may add the two equations together and they will cancel out.

 6x – 7y = 16
2x + 7y = 24
+___________
8x – 0 = 40
8x = 40
x = 5

Substitute 5 for x into either of the above equation and solve algebraically for y.

2x + 7y = 24
2(5) + 7y = 24
10 + 7y = 24
7y = 14
y = 2

Check work by plugging both x- and y-values into each original equation.

6x – 7y = 16 => 6(5) – 7(2) = 16 => 30 – 14 = 16
2x + 7y = 24 => 2(5) + 7(2) = 24 => 10 + 14 = 24

Answer:
x = 5; y = 2

(5, 2)

3 0

3 years ago

Jack picked 10 ears of corn. He and two of his sisters ate two each. What is the amount of corn left represented as a

Burka [1]

ANSWER:

Jack picked 10 ears of corn. The amount of corn left is $\frac{2}{5}$ ears of initial corn.

SOLUTION:

Given, Jack picked 10 ears of corn.

Now the total corn present is 10 ears.

He and two of his sisters ate two each.

Then, remaining corn = 10 ears – eaten corn

= 10 – 2 (by him) – 2 (by his first sister) -2 (by his second sister)

= 10 – 6 = 4

Now, the amount of corn left in fraction is remaining corn divided by initial corn.

Left over corn = $\frac{remaining corn}{initial corn}$

$= \frac{4}{10} = \frac{2}{5}$

Hence, the amount of corn left is $\frac{2}{5}$ ears of initial corn.

5 0

4 years ago

There are 64 squares on a chessboard

Radda [10]

Answer:False, there are 204!

Step-by-step explanation:

6 0

3 years ago

Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly o

Katena32 [7]

If the distribution is uniform between 6 and 12, the probability of being less than 99 is 1 (certainty).

_____

Perhaps you intend to find the probability that the loss is less than 9 pounds. That value is

... (9 - 6)/(12 - 6) = 3/6 = 1/2

6 0

3 years ago

Read 2 more answers

Ponderosa Paint and Glass carries three brands of paint. A customer wants to buy another gallon of paint to match paint she purc

sveta [45]

Answer:

$\frac{4}{9}$

Step-by-step explanation:

Two events are independent of each other, this is called Compound Probability. Classical example is if two coins are filped, what is the probability of getting two heads in a row.?

Answer: each has 50% probability because there are two states only, either H or T. since we have two coins the probability of getting two heads in row is the product of obtaining heads for each individual coin (which is independent of each other). or is $\frac{1}{2}$ × $\frac{1}{2}$ = $\frac{1}{4}$ = 25%. (Notice!).

Back to our problem, now here we have 3 paint brands and one of them is the right paint brand and two of them are not correct brands. so the prabablity that the customer has picked not correct brand is $\frac{2}{3}$ and her husband has not picked correct brand is also $\frac{2}{3}$ , since two probabilities are compound probabilities i.e indepandant of each other the probablity that both woman and her husband fail get correct brand is the product of the two and is = $\frac{2}{3}$ × $\frac{2}{3}$ = $\frac{4}{9}$ .

4 0

3 years ago