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Veseljchak [2.6K]
3 years ago
8

If anyone knows how to do this

Mathematics
1 answer:
iogann1982 [59]3 years ago
8 0

Answer:

1) 47

2) 4

Step-by-step explanation:

Complimentary = 90 degrees

1) 43 + ? = 90

? = 47

2) 86 + ? = 90

? = 4

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I am wondering Jake finished race at 24.53 18.44 Lacie finished the race at 18.44. What is the difference between Lacie's time a
Dvinal [7]

Answer:

The difference between the times is just 6.09

Step-by-step explanation:

Here, we are interested in finding the difference between the times when two athletes finished their races.

While one finished at 24.53, the other finished at 18.44; So the difference between the two will be calculated by subtracting the time which was less from the time which was more;

Mathematically, that would be 24.53 - 18.44 = 6.09

4 0
3 years ago
The area of a rectangle is expressed as x4 - 9y2. What are the possible dimensions of the rectangle?
AnnyKZ [126]

This is a stupid question.  The teacher who asked this needs to go back to school.

A = x⁴ - 9y²

That's going to be a number.  As long as it's positive we can choose any length for our rectangle L and we can compute the width by W=A/L.   So the correct answer is the dimensions are L by  (x⁴ - 9y²)/L.

They don't want the correct answer.  They want you to factor this expression.  We'll do it, but don't believe for a second this factoring somehow constrains the possible dimensions of some rectangle.

We use the difference of two squares, a²-b² = (a+b)(a-b)

A = x⁴ - 9y² = (x²)² - (3y)² = (x²+3y)(x²-3y)

Answer: x²+3y  by  x²-3y

5 0
3 years ago
I've been sitting on this problem for 2 hours! AND I STILL DON'T KNOW WHAT THE HECK IT ISSS!!!!
MArishka [77]

Answer:

A

Step-by-step explanation:

Use foil to expand it.

y = 4 (x^2 + 7x - 9x - 63)     Combine the like terms on the right.

y = 4(x^2 - 2x - 63)              Use the distributive property to remove the brackets.

y = 4x^2 - 8x - 4*63            Combine the two multiplied factors on the right.

y = 4x^2 - 8x - 252              4* 63 = 252

The answer is A

7 0
3 years ago
Help me please? Thank you
Fantom [35]

23

Step-by-step explanation:

angle DEF = 74 degrees.

well I would use sins but it's quite simple

Length of DE is 23, just like AB

5 0
2 years ago
What else would need to be congruent to show that triangle ABC cong Triangle XYX by ASA?
Alex777 [14]
<h3>Answer: First choice.  angle C = angle Z</h3>

Explanation:

AC = XZ shows that the horizontal pieces are congruent. This is the "S" of "ASA" as it stands for the pair of congruent sides. We are also given angle A = angle X. This is one of the "A"s in "ASA" as it stands for pair of congruent angles.

What we're missing is the other pair of angles. We must pick C and Z because they help sandwich the two sides mentioned above. ASA has the two angles surrounding the sides; or the sides are between the angles. We can't pick B and Y, unless we were doing AAS which is a similar related idea. The order matters when it comes to ASA and AAS. However, AAS is the same as SAA.

8 0
3 years ago
Read 2 more answers
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