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sergejj [24]
2 years ago
5

If a linear system has four equations and seven variables, then it must have infinitely many solutions. True or False

Mathematics
1 answer:
Savatey [412]2 years ago
7 0

Answer:

The statement is False.

Step-by-step explanation:

Consider the provided information.

If a linear system has four equations and seven variables, then it must have infinitely many solutions.

We need to determine the above statement is true or false.

The above statement is false, it could be inconsistent, and therefore have no solutions,

For example:

x_1+x_2+x_3+x_4 +x_5+x_6+x_7=0\\x_1+x_2+x_3 =1\\x_4 +x_5 =1\\x_6+ x_7=1

Hence, there is no solution.

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The results of a race car are shown. Determine who drove the fastest. Explain.
monitta

We have to calculate speed for 1 lap for all of 'em.

Cutwright - 84/35 = 2.4 mins for 1 lap

Evans- 96.6/42 = 2.3 mins for 1 lap

Liza- 102.6/38 = 2.7 mins for 1 lap

 So, EVANS drove fastest among them as he took less time...

8 0
1 year ago
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Everglades National Park is 225 mi long. What scale is needed to draw a map of Everglades National Park that is 10 in. long?
shusha [124]

Answer:

A. 1 in. = 22.5 mi

Step-by-step explanation:

Since 22.5 x 10 = 225, we can conclude that this will fit the scale needed. B. is incorrect because it is simply illogical in context with a scale and the question. C. is incorrect since 10 x 0.04 is 0.4, which does not equal 10. D. is incorrect since we need the scale to add up to equal 225 mi, not 22.5.

Hope this helps!

7 0
1 year ago
If the area of a park is exactly halfway between 2.4 and 2.5 acres, what is the area of the park
Ierofanga [76]
Answer:

2.45

Explanation:

Halfway of 2.4 and 2.5 is 2.45 because .05 is the halfway mark based on the place value.
6 0
1 year ago
I have a bag with 6 marbles numbered from 1 to 6. Mathew has a bag with 12 marbles numbered from 1 to 12. Matthew chooses one ma
MakcuM [25]
66 ways is the answer.

6 0
1 year ago
Belinda is thinking about buying a car for $38,000. The table below shows the projected value of two different cars for three ye
juin [17]

Answer:

Kindly check explanation

Step-by-step explanation:

Car A follows a linear pattern, as a straight well fitted line was obtained from the regression model, with a fixed amount as Depreciation per year.

CarB follows an exponential trve das obtained on the regression plot.

Using technology :

Where, f(x) = price of car

The linear function for car 1 :

f(x) = - 6000x + 38000

THE exponential function :

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In 5 years :

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