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alex41 [277]
2 years ago
7

The sum of 2 times a number and 4 equals 3 HELP ASAP

Mathematics
2 answers:
Olegator [25]2 years ago
7 0

Answer:

-1/2

Step-by-step explanation:

you have to make it like this and use a variable:

2<u><em>x</em></u>+4=3

take away 4 from both sides:

2<em><u>x</u></em>= -1

divide by 2:

<u><em>x</em></u> = -1/2

AlexFokin [52]2 years ago
5 0

Answer:

The number is - ½

Step-by-step explanation:

Let the missing number be x

2x + 4 = 3

2x = 3 - 4

2x = - 1

x = - ½

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What is the constant of proportionality?
11Alexandr11 [23.1K]

Answer: The constant of proportionality is 3.25.

Step-by-step explanation: Divide 6.5 by 2, 9.75 by 3, or 13 by 4 and every time you will get an answer of 3.25.

3 0
2 years ago
If 54% of all people between the ages of 35 and 50 ride a bike, find the probability for a sample of 30 people in that age group
Yuliya22 [10]

Answer:

The probability is 0.1312

Step-by-step explanation:

Here, let us set up a binomial system

From the question, 54% ride a bike

Let p = people that rides a bike

54% = 54/100 = 0.54

p = 0.54

q = 1 - p = 1 -0.54 = 0.46 ( 46% do not ride bikes)

Now, for the binomial system, we have

P(X = 15) = 30 C 15 • p^15•q^15

We have;

30 C 15 * 0.54^15 * 0.46^15

= 0.131200268998

The probability is 0.1312

8 0
3 years ago
If f:R→R is continuous at a point c∈ R and g:R→R is continuous at f(c)∈R, then the composition g(f(x)) :R→R is continuous at c.
natima [27]

Answer:

The assertion that g(f(x)) is continuous at c is true.

Step-by-step explanation:

let\\a=\lim_{x\rightarrow c}f(x)

\because f(x) is continuous at c

\\\\Similarly\\\\b=\lim_{x\rightarrow f(c)}g(x)

\because g(x) is continuous at \ x=f(c)

\lim_{x\rightarrow c }g(f(x))=g(f(c))\\\\=g(a) which is defined as per given data thus g(f(x)) is continuous at x=c

5 0
2 years ago
In right angled triangle abc ab=x cm bc=(x+7) and ac=17cm​
Katarina [22]

Answer:

2x^2+14x-240=0

Step-by-step explanation:

Remember Pythagoras's theorem?

a^2+b^2=c^2

So over here,

x^2+ (x+7)^2= 17^2 [ we need to now simplify (x+7)^2 --> (x+7) (x+7)  ]

x^2+ x^2+7x+7x+49= 289

2x^2+ 14x+49= 289

2x^2+14x+49=0 [ we need to make the right side zero coz thats

the rule for ]  

2x^2+14x-240=0

(idk, but i think the "show that  x^2.....) is wrong)

5 0
2 years ago
HELP ME WOTH THIS PLS!!
VikaD [51]
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3 0
3 years ago
Read 2 more answers
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