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forsale [732]
3 years ago
7

Use the discriminant to determine how many real number solutions exist for the quadratic equation −4x2 + 3x –28 = 0.

Mathematics
1 answer:
elixir [45]3 years ago
4 0

Answer:

c

Step-by-step explanation:

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If x/6=-3 then x=-18
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5 1/4 of what number is 42
amid [387]

Answer:

8

Step-by-step explanation:

5 1/4 =5.25

42/5.25 = 8

8×5.25 = 42

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A number, x, rounded to 1 significant figure is 200<br>Write down the error interval for x.​
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Answer: 150 <= x < 250

Step-by-step explanation:

A number, x, rounded to 1 significant figure is 200

Write down the error interval for x

Rounding x to 1 significant figure means that all subsequent digits after the first is rounded down to zero(0) (if the immediate number after the first is digit 5 or more, it is rounded to 1 and added to the first digit).

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They spent $448 on jerseys

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Come up with an example of three side lengths that can NOT possibly make a triangle, and explain how you know. Select ALL of the
horsena [70]

Answer:

The choices are

(a) 1 foot, 1 inch, and 1 inch

(b) 10 inches, 3 inches, and 5 inches

(c) 8 cm, 4 cm, and 2 cm  

(d) 14 m, 10 m, and 7 m

(e) 1 foot, 10 inches, and 7 inches

(f) 45 mm, 23 mm, and 38 mm

The options that CANNOT form a triangle are

(a), (b) and (c)

Step-by-step explanation:

An example of three side lengths that can not possibly make a triangle is

5 inches, 2 inches and 2 inches

This is because the sum of the other two sides is less than the length of the third side so their will not meet if they try to form a triangle

Select ALL of the answers below that CANNOT form a triangle. Group of answer choices

(a) 1 foot, 1 inch, and 1 inch

1 foot = 12 inches, so 12 inches , 1 inch, 1 inch will not form a triangle because as stated above, their ends will not meet

(b) 10 inches, 3 inches, and 5 inches

Similarly 3 inches + 5 inches = 8 inches <  10 inches. Hence not a triangle

(c) 8 cm, 4 cm, and 2 cm

4 cm + 2 cm = 6 cm < 8 cm. Hence not a triangle

(d) 14 m, 10 m, and 7 m

10 m + 7 m = 17 m > 14 m. Therefore they will form a triangle

(e) 1 foot, 10 inches, and 7 inches

10 inches + 7 inches = 17 inches > 12 inches. Therefore they will form a triangle

(f) 45 mm, 23 mm, and 38 mm

23 mm + 38 mm = 61 mm < 45 mm. Therefore they will form a triangle  

Among the above choices, a, b, c will not form a triangle.

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3 years ago
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