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tresset_1 [31]
3 years ago
11

A lorry is travelling at 13.5m/s along a stretch of road​

Mathematics
1 answer:
Luda [366]3 years ago
6 0

Answer:

Proved

Step-by-step explanation:

This question is incomplete. The complete details are:

v = 13.5m/s --- speed of the lorry

v_2 =50km/h --- speed limit on the road

Required

Prove that the lorry is within the speed limit

To do this, we simply convert the speed of the lorry to km/h.

So, we have:

v = 13.5m/s

1m = 0.001km

and

1s = \frac{1}{3600}h

So, the expression becomes:

v = \frac{13.5 * 0.001km}{1/3600h}

v = \frac{0.0135km}{1/3600h}

Rewrite as:

v = 0.0135km/h * 3600

v = 48.6km/h

<em>48.6km/h is less than 50km/h (the speed limit).</em>

<em>Hence, the lorry is within the speed limit.</em>

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A car dealership is buying a car for $10,500. They plan to sell it at $15,540. Calculate the percent increase.
lianna [129]

Answer:

67.5 percent (if you're rounding up 68 percent)

Step-by-step explanation:

10,500/15,540 which equals 0.675 turn this into a percent which is 67.5%

8 0
2 years ago
What value of x makes the equation 3(x - 6) - 8x = -2 + 5(2x + 1) true ?
Romashka-Z-Leto [24]

Answer:

x = -3

Step-by-step explanation:

3(x - 6)= -2 + 5(2x + 1)

= 3x - 18 = -2 + 10x + 5

= -18 = -2 + 7x + 5

= -18 = 7x + 3

= -21 = 7x

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3 years ago
Is this correct? I have an open dot on 2 with the arrow going to the right if it's not clear
dlinn [17]

Answer:

Yep! an open dot is <

A closed dot means ≤

Hope this helps! :)

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7 0
3 years ago
What percent of the values are between 10 and 30? Round to the nearest tenth of a percent if necessary.
skad [1K]

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6 0
2 years ago
Davis is putting tile in his rectangular kitchen. His kitchen is 13 feet long, and 17 feet wide. The tile davis is installing is
Fofino [41]

Answer:

It will cost is <u>$828.75</u>.

Step-by-step explanation:

Given:

Davis is putting tile in his rectangular kitchen. His kitchen is 13 feet long, and 17 feet wide. The tile davis is installing is $3.75 per square foot.

Now, to find the total cost.

Davis is putting tile in his rectangular kitchen.

Length = 13 feet.

Width = 17 feet.

So, to get the area of kitchen:

<em><u>Area = length × width</u></em>

Area = 13 × 17

Area = 221 square foot.

As, the unit rate is given.

Cost per square foot = $3.75.

Now, to get the total cost by using unitary method:

If cost of 1 square foot = $3.75.

So, the cost of 221 square foot = $3.75 × 221

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Therefore, it will cost  $828.75.

3 0
3 years ago
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