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2 years ago

Someone please help me

Mathematics

1 answer:

pentagon [3]2 years ago

8 0

Answer:

Option 3 or Option 4.

Step-by-step explanation:

I have this doubt because actually, a rhombus with a right angle (one) is not necessarily a square. Some rhombuses have one right angle and are still not squares. Now, if the four angles are right, it is a square, but this only says one.

On other hand, a parallelogram with congruent diagonals isn't a square necessarily either. Rectangles have congruent diagonals and are parallelograms.

In case you only can answer with one, I'll say is option 3, hope it helps!

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How many solutions does the equation have below:<br> -5x + 10x + 3 = 5x + 6

Anettt [7]

Answer:

2 Answer solutions if you do it two ways.

Step-by-step explanation:

7 0

3 years ago

A tourist boat is used for sightseeing in a nearby river. The boat travels 2.4 miles downstream and in the same amount of time,

topjm [15]

Answer: the current of the river is 3 mph.

Step-by-step explanation:

Let x represent the current of the river.

The boat travels 2.4 miles downstream. Assuming it travelled with the current of the river. If the boat travels at an average speed of 21 miles per hour in the still water, it means that the total speed at which the boat travelled downstream is

(21 + x) mph

Time = distance/speed

Time taken to travel downstream is

2.4/(21 + x)

it travels 1.8 miles upstream. Assuming it travelled against the current of the river. it means that the total speed at which the boat travelled upstream is

(21 - x) mph

Time taken to travel upstream is

1.8/(21 - x)

Since the time taken to travel upstream and downstream is the same, then

2.4/(21 + x) = 1.8/(21 - x)

Cross multiplying, it becomes

2.4(21 - x) = 1.8(21 + x)

50.4 - 2.4x = 37.8 + 1.8x

2.4x + 1.8x = 50.4 - 37.8

4.2x = 12.6

x = 12.6/4.2

x = 3 mph

7 0

3 years ago

Read 2 more answers

Brian rides his bike for 7.5 miles. The diameter of his bicycle tires is 20 inches. Estimate the

alekssr [168]

Answer:

7500 revolutions

Step-by-step explanation:

1 rotation of his bicycle tires is equivalent to 1 circumference in linear distance.

circumference = π*diameter = π*20 = 62.8 in

If 1 foot is equivalent to 12 inches, then 62.8 in are equivalent to:

1 ft / x ft = 12 in / 62.8 in

x = 62.8/12 = 5.2 ft

If 5280 ft are equivalent to 1 mile, then 5.2 ft are equivalent to:

5280 ft / 5.2 ft = 1 mile / x mile

x = 5.2/5280 = 0.001 mile

So, when 1 revolution is made, 0.001 mile had been travelled. To compute the number of revolutions after 7.5 miles are travelled, the following proportion must be satisfied:

1 revolution / x revolutions = 0.001 mile / 7.5 miles

x = 7.5/0.001 = 7500 revolutions

7 0

3 years ago

.<br> What is the perimeter of this tile?<br> 3 in.<br> 3 in.

trapecia [35]

Answer:

I think it's 12

Step-by-step explanation:

3 0

3 years ago

Malik works at a hardware store for $12 per hour and as a lifeguard for $18 per hour. He needs to earn at least $280 per week, b

Arte-miy333 [17]

Answer:

The system of inequalities is equal to

$12x+18y\geq280$

$x+y\leq 20$

Step-by-step explanation:

Let

x-----> the number of hours that Malik works at a hardware store

y-----> the number of hours that Malik works as a lifeguard

we know that

$12x+18y\geq280$ -----> inequality A

$x+y\leq 20$ -----> inequality B

Using a graphing tool

The solution is the shaded area

see the attached figure

8 0

3 years ago