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mash [69]
3 years ago
8

HELP PLEASEEEEE THIS WAS DUE 17 DAYS AGO!!!!

Mathematics
2 answers:
Blizzard [7]3 years ago
7 0

Answer:

x= 2, y= 1

Step-by-step explanation:

x= 2y

2x +5y =9

substitute x

2 *2y +5y = 9

4y +5y = 9

9y = 9

y =1

x= 2*y = 2*1= 2

Natalka [10]3 years ago
7 0

Answer:

x= 2

y=1

Step-by-step explanation:

2*2y+5y=9

y=1

x=2*1

x=2

(x,y) = (2,1)

Check:

2=2*1

2*2+5*1=9

2=2

9=9

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When you go swimming the pressure in your ears varies directly with the depth at which you swim. At 10 feet, the pressure is abo
Serjik [45]

Answer:

(a) p = 0.43d

(b) p = 21.5

(c) d = 151.163

Step-by-step explanation:

Given

Variation: Direct

Represent ear pressure with p and depth with d.

So, we have:

p\ \alpha\ d

d =10 when p =4.3

Solving (a): Write a variation

We have:

p\ \alpha\ d

Write as an equation

p = kd

Where: k is the constant of variation

d =10 when p =4.3

So, we have:

4.3 = k * 10

Make k the subject

k = \frac{4.3}{10}

k = 0.43

Substitute 0.43 for k in p = kd

p = 0.43d

Solving (b): Pressure at 50 feet

Substitute 50 for d in p = 0.43d

p = 0.43 * 50

p = 21.5

The pressure is 21.5 pounds per square

Solving (c): The safe depth

The safe depth stops at a pressure of 65psi.

Substitute 65 for p in p = 0.43d

65 = 0.43 * d

Make d the subject

d = \frac{65}{0.43}

d = 151.162790698

d = 151.163 -- approximated

<em>The safe distance for an amateur is 151.163ft</em>

8 0
3 years ago
Can we conclude that two similar figures can also be congruent figures? Explain.
shusha [124]

Answer:

In similar figures, the angles are congruent, even if the sides are not. Notice that one angle in each pair of figures corresponds to an angle in the other figure. They have the same shape but not the same size

7 0
3 years ago
The change of base formula is used to calculate a wider range of logarithms. True False
juin [17]
Your answer would be 

True

Hope I helped!
6 0
4 years ago
Read 2 more answers
What is the inverse of the function below? <br><br>f (x)  =  x  -  7<br><br>3
kupik [55]
I hope this helps you y=f (x)=x-7 y=x-7 x=y+7 f^-1 (x)=x+7
6 0
3 years ago
Flip a coin 10 times and record the observed number of heads and tails. For example, with 10 flips one might get 6 heads and 4 t
FromTheMoon [43]

Answer:

Theoretical probability = 50%

Experimental probability varies.

See below for explanation.

Step-by-step explanation:

This is a problem on theoretical and experimental probability. The results obtained would enable you understand their differences.

The theoretical probability is the result that is expected to happen, but it isn't always what eventually happens.

The theoretical probability of a coin landing on heads is ½ or 50%. This is same for tails.

The experimental probability is the probability obtained from carrying out the experiment. As this is the result of what actually happens, the experimental probability could be lesser  or greater than or equal to 50%.

You are required to carry out the experiment. This is because the result would vary from person to person as well as from one experiment to the other.

First, make a table for the number of trials, outcome (head and tail each) and the frequency. Pen down the result for each of the experiment carried out. You can use a tally to make it easy for compilation.

See attachment for table.

Theoretical probability of 10 trials:

Head= 5, tail = 5

Theoretical probability of 30 trials:

Head= 15, tail = 15

Theoretical probability of 100 trials:

Head= 50, tail = 50

It all amount to 50% each

So do your experiment and record the results. Afterwards compare your result  which is the experimental probability

for head and tail with the theoretical theoretical.

Also compare your result with that of your classmate.

8 0
4 years ago
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