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faust18 [17]
3 years ago
15

Can someone pls help me with this ​

Mathematics
1 answer:
Sergeu [11.5K]3 years ago
8 0

Answer:The perimeter of the combined figure can be calculated by doing the sum of all sides of all figures.

Step-by-step explanation:

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I know the answer to this
3 0
3 years ago
Find 80% of $200 [1]
SCORPION-xisa [38]

Answer:

80% of $200 would be $160

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3 years ago
X²+y²+14-4y-11+0 determine the center and the radious
marishachu [46]

Answer:

The Center: (0, 2)

The Radius: 1

Step-by-step explanation:

8 0
3 years ago
Johnny and David are saving money to purchase an Xbox that costs $200.
irina [24]

Answer:

A. Both of Johny's (f(x)) and David's functions (g(x))  are linear.

B. (f(x) - 75) ∝ x and  g(x) ∝ x

where x = no. of working hours,

          f(x), g(x)  = money saved

C. Equation for Johny is,

  y = 75 + 10x

where, x = no. of hours Johny works

            y = money saved by Johny.

D. Equation for David is,

  y = 20x

where, x = no. of hours David works

            y = money saved by David

E. David will buy the X-box earlier. it can be found by putting f(x) = g(x) = 200 in the two equations and from that comparing the two values of x.

Step-by-step explanation:

Let the equation for Johny be,

y = mx + c

where c is the y intercept which is here 75 and m is the slope of the straight line which is here ,

m = \frac{125 - 75}{5 - 0}

  = 10      [since (125 ,5) and (75 ,0) are over the straight line]

So, Johny's equation is,

y = 10x + 75 = f(x) [say]-------------------------------------------------(1)

which is linear.

Now slopes of different straight lines connecting the points for David  are all equal to 20 ,

                      [since,     \frac{40 - 0}{2 -0}

                                   = \frac{80 - 40}{4 -2}

                                   = \frac{120 - 80}{6 -4}

                                   = \frac{160 - 120}{8 -6}

                                   = \frac{200 - 160}{10 -8}

                                   = 20]

So, David's equation is also a straight line with y intercept 0 and slope 20.

So, David's equation is,

y = 20x = g(x) [say] --------------------------(2)

A. Now, from (1) and (2) both of Johny's and David's functions  are linear.

B. From (1)  (f(x) - 75) ∝ x and from (2)  g(x) ∝ x

C. Equation for Johny is,

  y = 75 + 10x

where, x = no. of hours Johny works

            y = money saved by Johny.

D. Equation for David is,

  y = 20x

where, x = no. of hours David works

            y = money saved by David

E. Putting y = 200 in (1) we  get,

125 = 10x

⇒12.5 , so, Johny will earn the money in 12.5 hours.

and, putting y = 200 in (2) we get, x = 10 so, David will earn the money in 10 hours. since, 10 < 12.5 so, David will be able to purchase the X-box first.

4 0
3 years ago
Sara and Gordon win some money and share it in the ratio 5:2. Sara gets £21 more than Gordon. How much did Gordon get?
luda_lava [24]

5x=2x+21

5x-2x=21

3x=21 //3

x=7

2*7=14

Gordon have £14

5 0
3 years ago
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