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3 years ago

Which of the following statements is true?

Mathematics

1 answer:

lutik1710 [3]3 years ago

6 0

Answer:

Option (3)

Step-by-step explanation:

Perpendicular lines: Perpendicular lines are the lines that intersect each other at right angles

Intersecting lines: Intersecting lines are the lines that intersect each other at a point to form angles but vertically opposite angles are equal

Hence , from above conclusion we can write Perpendicular lines must cross to form ninety degree angles, but intersecting lines cross to form angles of varying measures.

Hence , Option (3) is correct answer

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The radius of the aluminum (Al) atom is 143 pm. The radius of the aluminum ion (Al3+) is 54 pm. By what percentage did the radiu

Romashka [77]

Answer:

There was 62.23% change in radius as the ion formed.

Step-by-step explanation:

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3 years ago

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3 years ago

Solve the equation. x2 18x 81 = 25<br> a. 14, 4<br> b. –4, –14<br> c. 14, –14<br> d. –4, 4

Snowcat [4.5K]

Answer:

The answer is the option B

$-4,-14$

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form $ax^{2} +bx+c=0$ is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}+18x+81=25$

$x^{2}+18x+56=0$

$a=1\\b=18\\c=56$

substitute in the formula

$x=\frac{-18(+/-)\sqrt{18^{2}-4(1)(56)}} {2(1)}$

$x=\frac{-18(+/-)\sqrt{100}} {2}$

$x=\frac{-18(+/-)10} {2}$

$x1=\frac{-18+10} {2}=-4$

$x2=\frac{-18-10} {2}=-14$

7 0

3 years ago

Read 2 more answers

Sasha runs 8 miles on Thursday, then runs 8 more miles on Friday, she ran 1/2 mile on Saturday. hHOW MANY MILES DID SHE RUN? PLE

Over [174]

Answer:

16 1/2 miles

Step-by-step explanation:

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3 years ago

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Of the 14 professional sports team in Tennessee, 9 are baseball teams. About what percent of the professional sports teams in Te

Westkost [7]

Answer:

64.3%

Step-by-step explanation:

Number of professional sports team in Tennessee is equal to 14

9 are baseball teams

Percentage of baseball teams

= no. of baseball teams/ no. of sports team x 100%

That’s 9/14 x 100%

0.643 x 100%

64.3%

The percentage of baseball team in Tennessee professional sports team is 64.3%

6 0

4 years ago