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romanna [79]
2 years ago
6

The area of a square equals the square of a length of the side of the square. The perimeter equals the sum of the lengths of all

four sides. The sum of the areas of two squares is 65 while the difference in their areas is 33. Find the sum of their perimeters.
The sum of the perimeters is [x]
Mathematics
1 answer:
solong [7]2 years ago
5 0

Answer:Each side of x would be 7 and each side of y would be 4.

Step-by-step explanation:

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The variables xx and yy vary directly. use the values to find the constant of proportionality, kk. then write an equation that r
Sergeu [11.5K]
Direct variation means that changes in x will result to changes in y. If x increase, y also increases and vice versa.

y = kx
k = y / x

y = 45 ; x = 40

k = 45/40 
k = 1.125

y = 1.125x 

y will increase by 1.125 interval of x. 


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3 years ago
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A car travels at a speed of 55 kilometers per hour.Find the distance travelled by the car in 12 minutes and 30 seconds.Find the
never [62]

Answer:

Step-by-step explanation:

(distance) d = (speed) s * t (time)

                    = 55km/h * 12.30m/s

                    = 11.275 km

                    = 11.275 * 1000

                    = 11275m

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2 years ago
What are expressions always equivalent to 4(6+2x)
timurjin [86]
24+12x is the answer
4 0
3 years ago
The diagram shows a prism.
telo118 [61]

Answer:

Total surface area of the prism = 920 cm²

Step-by-step explanation:

Given prism has 2 similar triangular surfaces and 3 rectangular surfaces of different dimensions.

Area of one triangular side = \frac{1}{2}(\text{Base})(\text{Height})

Area of 2 similar sides = Base × Height

                                     = 8 × 15

                                     = 120 cm²

Area of rectangular side with dimensions 17cm × 20cm

Area of the side = 17 × 20 = 340 cm²

Area of the second rectangular side with dimensions 8cm × 20cm

Area of the side = 8 × 20 = 160 cm²

Area of third rectangular side with dimensions 20cm × 15cm

Area of the side = 20 × 15 = 300 cm²

Total surface area of the given triangular prism = 120 + 340 + 160 + 300

                                                                               = 920 cm²

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3 years ago
Solve 1/2n x (n+1) =78
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Answer:

n=-13, n=12

Step-by-step explanation:

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2 years ago
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