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notsponge [240]
3 years ago
6

How dot figure out the perimeter of Question 2, a

Mathematics
1 answer:
lora16 [44]3 years ago
7 0

Answer:

51.96 mm

Step-by-step explanation:

Perimeter of circle = 2 × pi × r

Perimeter of small circle

= 2 × 3.14 × 10/2

= 31.4 mm

half of perimeter of small circle = 31.4/2 = 15.7 mm

Perimeter of large circle

= 2 × 3.14 × (5+4)

= 2 × 3.14 × 9

= 56.52

half of perimeter of large circle = 56.52/2 = 28.26 mm

All line = half line small circle + half line large circle + (4 × 2)

All line = 15.7 + 28.26 + 8

= 51.96 mm

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5. Use the equation shown to answer a-b.
soldi70 [24.7K]

Answer:

a. No

b. 2.25 days

Step-by-step explanation:

0.75x + 3 = 0.25x + 5.25

a......................

Constants are $3 and $5.25 respectively

Topping costs $0.75 and $0.25 respectively

To have same cost the toppings number would be different as cost is different.

Suppose the number of toppings is x in one shop and y in the other, then the spending if same, we get this equation:

  • 0.75x + 3 = 0.25y + 5.25

The answer is NO due to two different variables in the equation

b.......................

Constants are $3 and $5.25 respectively

Joseph adds $0.75 each day and Kelsey spends $0.25 each day

Number of days should be same in this case, so variable will be same and the result (amount left in bank) is same.

<u>So the equation for this case is:</u>

  • 3 + 0.75x = 5.25 - 025x

<u>Solving, we get:</u>

  • 0.75x + 0.25x = 5.25 - 3
  • x = 2.25

This is the solution to equation despite being a whole number.

4 0
3 years ago
Solve for x b
dedylja [7]

Step-by-step explanation:

10x+1=12x-5

1+5=12x-10x

6=2x

6/2=2x/2

3=x

8 0
2 years ago
A submarine was 20 feet below sea level. If it ascends (goes up) 30 feet,
pshichka [43]

Answer:

10 ft above sea level

Step-by-step explanation:

20 below goes up by 30 then it would be -20 -10 0 10

6 0
3 years ago
Beth takes measurements of her door . The diagonal line is 12 ft and the base is 4 ft . what is the height of her door?
attashe74 [19]

Answer:

the answer is E, right?

Step-by-step explanation:

8 0
3 years ago
a student usually saves $45 a month. He would like to reach a goal of saving $700 in 12 months. The student writes the equation
serg [7]

Answer:

in this case, x is the amount more he needs to save per month

350=12(x+20)

distribute

350=12x+240

minus 240 both sides

110=12x

divide both sides by 12

9.166666=x

needs to save about $9.17 more per  month or 29.17 permonth

Step-by-step explanation:

sorry if its wrong i tried and maybe i could get brainliest?

3 0
2 years ago
Read 2 more answers
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