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kati45 [8]
3 years ago
14

What is the scale factor ? And given that QY’ = 4.125 what is QY?

Mathematics
1 answer:
iogann1982 [59]3 years ago
5 0

Answer:

4

Step-by-step explanation:

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Can someone help me please ​
andrey2020 [161]

Answer: y = 6

Step-by-step explanation:

A square's area can be done by using s^2, where s is y in this case.  Because there are 5 squares, the area of the figure is 5y^2.  Because the area is also 180cm, 5y^2=180.

Then divide both sides of the equation by 5 to get y^2 = 36.  Then square root both sides of the equation to get y = 6.

Hope it helps <3

7 0
3 years ago
Is 7n equivalent to 15n-8n
Lemur [1.5K]

Answer:

Yes.

Step-by-step explanation:

Yes. When we simplify 15n-8n, it equals 7n.

5 0
2 years ago
The speed of a boat in still water is 40 mph. If it takes the same time for the boat to travel 8 miles upstream as it does to tr
antoniya [11.8K]

Answer:

Current speed is 40mph

Step-by-step explanation:

We firstly need to know what is intended by upstream and downstream. When the boat travels in the direction of the current (horizontal movement of the water), we say it is moving downstream otherwise it is moving upstream.

Let's assume the speed of the boat is A and that of the current is B, then the speed when it moves dowstream would be A + B and the speed if it moves upstream would be A – B.

In this question, we know that the speed of the boat is 40mph. Given that it takes the same time to travel 8miles upstream as it does to travel 24miles downstream, we have

Speed upstream = 8/t

Speed downstream = 24/t

Respectively.

Let speed of current be X, then

Speed downstream = 40 + X

Speed upstream = 40 – X

From the question we have:

(40 + x)/24 = (40 – X)/8

(40 + x)/3 = (40 – x)/1

3(40 – x) = 40 + X

120 – 3x = 40 – X

120 – 40 = 3x – X

2x = 80

X = 40.

Therefore, current speed is 40mph

5 0
2 years ago
What is the 5% sales tax on a $14.00 compact disc
natima [27]
5% sales tax would be $0.70
4 0
3 years ago
Read 2 more answers
An angle that is supplementary to an angle that measures 42° would measure _____°.
Ede4ka [16]
Supplementary angles add up to 180 degrees. to find one just subtract. 
180- 42= 138
7 0
3 years ago
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