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liq [111]
3 years ago
14

If y is directly proportional to x and Y = 40 when x=4 what is the value of x when y =23

Mathematics
1 answer:
Feliz [49]3 years ago
8 0

Answer:

2.3

Step-by-step explanation:

Since y is directly proportional to x,

<h3>y = kx.</h3><h3>=> 40=k X 4</h3><h3>=> k=10</h3><h3>So y=10x</h3><h3>If we put y=23 in the above equation,</h3><h3>x=2.3</h3><h3 /><h3>or </h3><h3 /><h3>40:4 = 23:x</h3><h3>=>x=2.3</h3>
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What is the number? I did many ways but i didn't found it, please guys help me with it. ​
Advocard [28]

Answer:

A). 15

B). -1.2

Step-by-step explanation:

A). [10(x+3)]-20 = 160

10x+30-20 = 160

10x+10 = 160

10x = 160-10

10x = 150

x = 150/10

x = 15

B). 5{[4(8+(5x))]-9} = 85

5(32+20x+9) = 85

5(32+9+20x) = 85

5(41+20x) = 85

205+100x = 85

100x = 85-205

100x = -120

100x/100 = -120/100

x = -1.2

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HOPE THIS HELPS!!!

3 0
3 years ago
A) Find the value of 3x – 2 when x = 4<br>b) Find the value of 5x + 6 when x = -2​
Svetradugi [14.3K]

Answer: 10 and -4

Step-by-step explanation:

3x - 2 Plug in 4 for x

3(4) - 2 = 12 - 2 = 10

5x + 6. Plug in -2 for x

5(-2) + 6 = -10 + 6 = -4

8 0
3 years ago
Billy is hiking in Colorado. He walks eastward four miles, then turns $60$ degrees northward and walks six miles. How far is he
nikklg [1K]

He is  2√19 miles far way from starting point.

Suppose Billy starts at point A, turns at point B, and ends at point D, as shown below.

If Billy turns 60◦ northward and walks six miles, then we can draw a 30 − 60 − 90 triangle whose hypotenuse is 6 miles

It follows that Billy traveled 6/2 = 3 miles eastward during these 6 miles, and that he traveled 3√3 miles northward during these 6 miles. In total, Billy traveled 4 + 3 = 7 miles  eastward and 3√ 3 miles northward.

By the Pythagorean Theorem, the distance from his starting point is q:

(7)2 + (3√3)2

=√49 + 27

= √76

= 2√19 .

Learn more about Pythagorean Theorem on:

brainly.com/question/20545047

#SPJ4

5 0
1 year ago
Help quick please
GaryK [48]

Answer:

Growth

Step-by-step explanation:

since the (1.05) is bigger than 1 it is growth but if it was lower then  1 it would be decay .

3 0
2 years ago
Out of 32 students in a class, 5 said they ride their bikes to school. based on these results,how many of 800 students in the sc
Colt1911 [192]
Do a proportion.
5/32= x/800
Cross multiply and divide
800 x 5= 4,000
4,000 divided by 32= 125
So answer is 125 students
6 0
3 years ago
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