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3 years ago

I need to know the answer

Mathematics

1 answer:

Yuri [45]3 years ago

3 0

Answer:

A only.

Step-by-step explanation:

A. 2^2 + 3(2) - 10 = 0

4 + 6 - 10 = 0

10 - 10 = 0

0 = 0 (correct)

-5^2 + 3(-5) - 10 = 0

25 + (-15) - 10 = 0

10 - 10 = 0

0 = 0 (correct)

B. 2^2 - 3(2) - 10 = 0

4 - 6 - 10 = 0

-2 - 10 = 0

-12 = 0 (not correct)

-5^2 - 3(-5) - 10 = 0

25 - (-15) - 10 = 0

40 - 10 = 0

30 = 0 (not correct)

C. 2^2 + 7(2) + 10 = 0

4 + 14 + 10 = 0

18 + 10 = 0

28 = 0 (not correct)

-5^2 + 7(-5) + 10 = 0

25 + (-35) + 10 = 0

-10 + 10 = 0

0 = 0 (correct)

D. 2^2 - 7(2) + 10 = 0

4 - 14 + 10 = 0

-10 + 10 = 0

0 = 0 (correct)

-5^2 - 7(-5) + 10 = 0

25 - (-35) + 10 = 0

60 + 10 = 0

70 = 0 (not correct)

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Answer:

14,130 cm³

Step-by-step explanation:

V = 4/3πr³

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3 years ago

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Give the linear system: 3x + 7y = 20 x ? 4y = 9 Identify the values for the elements in the coefficient matrix: A = a11 a12 a21

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Answer: a11 = 3, a12 = 7, a21 = 1, a22 = -4

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column 1 column 2

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Find the area of a triangle whose sides are 35 cm, 45 cm and 50 cm.

Morgarella [4.7K]

Answer:To find out the Area of a scalene triangle whose three sides are given, first find out the half perimeter

s = (a+b+c)/2

where a, b, and c are the length of the three sides of a triangle

s = (35 + 45 + 50) / 2

= 130 / 2

= 65 cm

Area of scalene triangle is given by

A = sqrt (s (s - a) (s - b) (s - c))

= sqrt (65 * (65 - 35) ( 65 - 45) (65 - 50))

= sqrt (65 * 30 * 20 * 15)

= sqrt (585000)

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Step-by-step explanation:

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2 years ago

Reagan has a rectangular bedspread that measures 238 cm x 435 cm she wants to sew a French around the edge of the bed spread wha

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Answer:

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First of all it is fringe, not french or friends.

Now, as we know that perimeter'P' of a rectangular is given by

P=2(length +width)

Given

length=435 cm

width=238 cm

P=2(435 +238) => 1346cm

Therefore, Rhiannon needs to purchase 1346cm of fringe

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3 years ago