MATHEMATICS HIGH SCHOOL

Keiala drives 324 miles in 4 hours. How many miles does she drive each hour?

Answers

Answer 1
Answer:

She drove an average of 81 miles per hour.

324/4 = 81
Answer 2
Answer: she drove 81 miles an hour.

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The third term of an arithmetic sequence is 21, and the eighth term is 56. The first term is _____.
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find the inequality represented by the graph​

Answers

Answer:

the inequality is y>1/3x -3

Step-by-step explanation:

im built different

Triangle ABC has three sides with these lengths: AB = 9, BC = 40, and CA = 41. What is the value of cos C? A. 9/41 B. 40/9 C. 40/41 D. 9/40

Answers

The answer is letter C which is 40/41. If you draw a triangle the sides found in the cos C is BC which is equal to 40 and the CA which is equal to 41 or the 40/41. It can not be the AB since it is in the opposite side of the cos C. 
It's a rectangular triangle because:

9² + 40² = 41²
81 + 1600 = 1681
1681 = 1681

Answer: C. cos∡C = 40/41

Can anyone help me please?
What is
21 times x = 7

Answers

Answer:

x = 1/3

Step-by-step explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other:

21x = 7

Divide 21 from both sides:

(21x)/21 = (7)/21

x = 7/21

x = 1/3

x = 1/3 is your answer.

~

Answer: is 3 unless you mean that the x=7 if you mean that then it would be 147

Look at the figures. How can you prove these triangles are congruent?

Answers

By SAScongruence rule Triangles DFE and ACB are Congruent.

What is Congruency?

Twoangles and a non-included side of a triangle are said to be congruent when they are equivalent to the corresponding angles and sides of another triangle.

The measurements of the sides and angles of two or more triangles determine their congruence. A triangle's size is determined by its three sides, and its shape is determined by its three angles. Two triangles are said to be congruent if the pairings of their respective sides and angles are equal.

We have Two Triangles DFE and ACB.

Now, from the triangles we have

AC = DF

BC = EF

< ACB = < DFE

and, the angle which is congruent is in between two congruent sides.

So, by SAS congruence rule Triangles DFE and ACB are Congruent.

Learn more about congruence rule here:

brainly.com/question/30930603

#SPJ7

Answer:

You can use the Side-Angle-Side Postulate.

Step-by-step explanation:

The Side-Angle-Side (or SAS) Postulate basically states that if two sides of two triangles and the included angle are congruent, the two triangles are congruent.

In a day, Robin spends 6 hours at school, sleeps for 9 hours, plays for 3 hours, and spends the rest of the time doing other things. Robin spends ______% of the day playing and _____% of the day doing things other than sleeping, playing, or going to school.

Answers

Answer:

Robin spends 12.5% of the day playing and 25% of the day doing things other than sleeping, playing, or going to school.

Step-by-step explanation:

In a day, Robin spends his time :

At school = 6 hours

Sleeps = 9 hours

Plays = 3 hours

Total time spent = 6 + 9 + 3 = 18 hours

Time left = 24 - 18 = 6 hours

doing other things = 6 hours

Now we have to calculate what % of the day he is playing and doing other things.

He spends 3 hours in playing = 3 hours of 24 hours

= 3 ÷ 24 × 100 = 12.5%

He spends 6 hours in doing other things = 6 hours of 24 hours

= 6 ÷ 24 × 100 = 25%

Robin spends 12.5% of the day playing and 25% of the day doing things other than sleeping, playing, or going to school.
6hrs = school
9hrs = sleeps              = 18hrs // 24hrs      ----6hrs left
3hrs = plays

6hrs = other things


playing = 12.5% -- 3/24                 3/24*100
other things = 25% -- 6/24             6/24*100

I need help choosing which multiple choice the answer would be ?

Answers

Add 6 to both sides
So answer B
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