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3 years ago

63a-42b Please help!

Mathematics

1 answer:

Gennadij [26K]3 years ago

7 0

21(3a-2b) hope this help !
I’m sorry if I’m wrong

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Could I get some help please?

GrogVix [38]

C. The area of the rectangle is 21 and the area of the semi circle is 3.53.

8 0

2 years ago

In 2006 the average ticket price for a national football league game was 62.38. Since then the cost has increased an average of

monitta

Answer:

y = 2.54x + 62.38

Step-by-step explanation:

Let x represent the duration or stipulated years after the year 2006

Let y represent the amount of ticket that is sold

Let m represent the average increase in the price every year

y = mx + c

y = 2.54 × x + 62.38

y = 2.54x + 62.38

8 0

2 years ago

The track and field coach records Ian's 400-meter race times during three practices. How much greater was the percent of change

BigorU [14]

Answer:

d. 1.5%

Step-by-step explanation:

Given - The track and field coach records Ian's 400-meter race times during three practices.

Practice 1 2 3

Time (s) 63 60 58

To find - How much greater was the percent of change from Practice 1 to Practice 2 than from Practice 2 to Practice 3? Round to the nearest tenth.

a. 7.9%

b. 4.8%

c. 3.3%

d. 1.5%

Proof -

% change from Practice 1 to Practice 2 change = $\frac{60 - 63}{63}. 100$ %

= $-\frac{3}{63}.100$ % = - 4.761904762 %

⇒% change from Practice 1 to Practice 2 change = - 4.762 %

Now,

% change from Practice 2 to Practice 3 change = $\frac{58 - 60}{60}. 100$ %

= $-\frac{2}{60}.100$ % = - 3.334 %

⇒% change from Practice 2 to Practice 3 change = - 3.3334 %

So,

- 4.461904762% - (- 3.3334%) = -4.461904762 + 3.3334 % = -1.4285 % ≈ 1.5%

∴ we get

Value = 1.5%

The correct option is - d. 1.5%

4 0

2 years ago

If there are four teams in a league, how many games will have to be played so that each team plays every other team once?

Sedaia [141]

Answer:

6 matches

Step-by-step explanation:

Let’s call the teams A B C D

A will play B C D = 3 matches

B will play only C and D as it already played A, making 2 matches

C will play D, making 1 match

D has already played all

Total number of matches is thus 3 + 2 + 1 = 6 matches

3 0

3 years ago

7x-3=-3+7x i neep help answer this please

erica [24]

Answer:

All real numbers are solutions.

Step-by-step explanation:

Let's solve your equation step-by-step.

7x− 3 = − 3 + 7x

Step 1: Simplify both sides of the equation.

7x − 3 = −3 + 7x

7x + −3 = −3 + 7x

7x − 3 = 7x − 3

Step 2: Subtract 7x from both sides.

7x− 3 −7x = 7x −3 −7x

−3 = −3

Step 3: Add 3 to both sides.

−3 + 3 = −3 + 3

0 = 0

7 0

2 years ago

Read 2 more answers