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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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Five divided by two multiplied by a number then decreased by eleven is equal to four. Find the number.
I am Lyosha [343]

Answer:

the number = 8/5 or 1 3/5 or 1.6

Step-by-step explanation:

n = the number

5/2n - 11 = 4

5/2n - 11 + 11 = 5 / 2n

5/2n = 4

5/2n / 5/2 = n

4 / 5/2 = 8/5

3 0
3 years ago
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The function is given by the formula f(x)=3x+2. a Find f(7).
Artyom0805 [142]

Answer:

Step-by-step explanation:

plug in 7

f(x)=3(7)+2

multiply 3 and 7 which is 21

and 2

f(x)=23.

5 0
3 years ago
C = 7a^4+ + 5a²b2 – 3b^4<br> D=5a^4 + 7a²b^2 + 3b^4<br> C - D =
Gekata [30.6K]

Answer:

2a^4 +12a

2 {a}^{4}  + 12 { a}^{2}  \\  \times  \times

5 0
2 years ago
Read 2 more answers
Really need helpppp?!
user100 [1]

Answer:

6.43

pls follow me and mark brainliest ...thank u

Step-by-step explanation:

length of side x will be

Tan tita = opp/adjacent

tan65 = x/3

tan 65 is 2.14

so...you are left with 2.14=x/3

by cross multiplying

x= 2.14 × 3

= 6.43

5 0
3 years ago
What is the solution set of {x | x &gt; -3} {x | x &lt; 3}?
givi [52]

x > -3

x < 3

<em><u>-3 < x < 3</u></em>

question didn't mention about "x is real number, or positive, or negative etc".. so we can't say anything more

for example: x can be -2,-1,0,1,2

but if only positive, x can be = 1,2

" " negative, x can be = -1, -2

Hope this helps ^-^

7 0
2 years ago
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