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ivolga24 [154]
3 years ago
5

What is the value of 7x2 + 2x when x = 3? (Please show answer :D)

Mathematics
2 answers:
Vesna [10]3 years ago
6 0
The answer is 20 for your answer
Nostrana [21]3 years ago
5 0

Answer:

20

Step-by-step explanation:

7 x 2 + 2x

plug in variable into equation

7 x 2 + 2(3)

P.E.M.D.A.S (multiply before adding)

14 + 6

20

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A rectangular field has an area 28800 sq.meter.its length is twice as long as its width.what is the length of its sides?
AVprozaik [17]
Let 
x---------> the length side of rectangle
y---------> the width side of rectangle

we know that
x=2y-----> equation 1
area=x*y-------> 28800=x*y------> equation 2
substitute 1 in 2

28800=[2y]*y-----> 28800=2y²-------> y²=14400------> y=120 m
x=2*y----> x=2*120------> x=240 m

the answer is
the length side of rectangle is 240 m
 the width side of rectangle is 120 m


5 0
3 years ago
Which situation can be modeled using a linear function?
SVETLANKA909090 [29]

Answer:

the distance covered by a car at a constant speed

3 0
3 years ago
Can someone answer this question please answer it correctly if it’s corect I will mark you brainliest
schepotkina [342]

Answer:

1/9

Step-by-step explanation:

The possible choices 2,3,4

odd numbers: 3

P (odd number) = number of odd numbers /total

                          = 1/3

Then we spin again

The possible choices 2,3,4

We want a 3: 3

P (3) = number of 3's /total

                          = 1/3

Since the first spin did not affect the second spin

P(odd, then 3) = P(odd) *P( 3)

                        = 1/3* 1/3

                         =1/9

3 0
4 years ago
Find the equation of the linear function passing through (2,3) and (5,12)
Elis [28]

y = 3x - 3 is the equation of the linear function passing through (2, 3) and (5, 12)

<em><u>Solution:</u></em>

Given that we have to find the equation of linear function passing through (2, 3) and (5, 12)

The formula y = mx + b is said to be a linear function

Where "m" is the slope of line and "b" is the y - intercept

Let us first find the slope of line

m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

\text {Here } x_{1}=2 ; y_{1}=3 ; x_{2}=5 ; y_{2}=12

Substituting values we get,

m=\frac{12-3}{5-2}=\frac{9}{3}=3

Thus slope of line is m = 3

To find the y - intercept, substitute m = 3 and (x, y) = (2, 3) in y = mx + b

3 = 3(2) + b

3 = 6 + b

b = 3 - 6

b = -3

Thus the required equation of linear function is:

Substitute m = 3 and b = -3 in formula

y = mx + b

y = 3x - 3

Thus the equation of linear function is found

6 0
3 years ago
For which set of probabilities would events A and B be independent?
Basile [38]
The answer is a because set of probalitie
4 0
3 years ago
Read 2 more answers
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