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3 years ago

Evaluate. 5(−6)= ________

Mathematics

1 answer:

zhannawk [14.2K]3 years ago

7 0

5(-6)= -1 should be if not I’m sorry

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Decide whether each table could represent a proportional relationship. If the

Ymorist [56]

Answer:

Step-by-step explanation:

If given tables in the picture show the proportional relationship,

Number of wheels (w) ∝ Number of buses (b)

w ∝ b

w = kb

Here, k = proportionality constant

k = $\frac{w}{b}$

Number of buses (b) Number wheels (w) Wheels per bus $(\frac{w}{b})$

5 30 $\frac{30}{5}=6$

8 48 $\frac{48}{8}=6$

10 60 $\frac{60}{10}=6$

15 90 $\frac{90}{15}=6$

Here, proportionality constant is 6.

Similarly, If number of wheels (w) ∝ Number of train cars (t)

w = kt

Here, k = proportionality constant

k = $\frac{w}{t}$

Number of train cars(t) Number of wheels(w) Wheels per train car ( $\frac{w}{t}$ )

20 184 $\frac{184}{20}=9.2$

30 264 $\frac{264}{30}=8.8$

40 344 $\frac{344}{40}=8.6$

50 424 $\frac{424}{50}=8.48$

Since, ratio of w and t is not constant, relation between number of wheels and number of train cars is not proportional.

5 0

3 years ago

Add - 3/x + 7y/x . -4y/2x -3 + 7y/x - 10y/x -3 + 7y/2x

yanalaym [24]

Answer:

$-\frac{3}{x} + \frac{7y}{x} = \frac{-3+ 7y}{x}$

Step-by-step explanation:

Given

$-\frac{3}{x} , \frac{7y}{x}$

Required

Add

The statement can be interpreted as:

$-\frac{3}{x} + \frac{7y}{x}$

Take LCM

$-\frac{3}{x} + \frac{7y}{x} = \frac{-3+ 7y}{x}$

3 0

2 years ago

The area of a children square playground is 50m squared.

densk [106]

Answer:

a. solution

Area = 50 m^2

Area of square = l^2

or, 50 m^2 = l^2

or, √50m^2 = l

or, 5√2 m= l

Hence, The exact length of the playground is 5√2 m.

7 0

3 years ago

Cost of 9 candies at $1.11 each?

Andreas93 [3]

1.11 * 9 = 9.99

The cost of 9 candies is $9.99.

4 0

3 years ago

a passenger elevator in the sears tower in chicago can lift people 960 feet in 1 minute and 30 seconds. How fast must the freigh

OleMash [197]

Given that a passenger elevator in the sears tower in Chicago can lift people 960 feet in 1 minute and 30 seconds (1.5 minutes). This means that the lift is travelling with a speed of:

 $speed= \frac{distance}{time} = \frac{960}{1.5} =640ft/min$

If the elevator lifts cargo through the same height in 2 minutes and 30 seconds (2.5 minutes), then the speed is given by:

 $speed= \frac{960}{2.5} =384ft/min$

3 0

3 years ago