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lisabon 2012 [21]
3 years ago
12

What is the value of x in the equation 0.7 x - 1.4 = -3.5

Mathematics
1 answer:
Daniel [21]3 years ago
4 0

Answer:

x=12.5

Step-by-step explanation:

0.7x times (-1.4)=-3.5

-0.28x=-3.5 (divide both sides)

Ans:12.5

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F(x)=-4x^2+10x-8
vazorg [7]

Answer:

Step-by-step explanation:

a = - 4

b = 10

c = - 8

The discriminate is

D = b^2 - 4ac

D = 10^2 - 4*(-4)(-8)

D = 100 -  128

D = - 28 which is not a nice number

Because the Discriminate has a minus result, there are no real zeros.

6 0
3 years ago
Write and graph an equation in two variables that shows the relationship between the time and the distance.
cluponka [151]

Answer:

The relation between the time and the distance will be:

y = 15x

The graph of the equation y = 15x is attached below.

Step-by-step explanation:

We know that the equation of linear function in two variables in the slope-intercept form is

y = mx+b

where

  • m is the rate of change or slope
  • b is the y-intercept

Let y be the distance

Let t be the time

Given that the object moves 15 meters in 1 second.

Thus, the rate of change or slope = m = 15

As there is no initial condition in our case.

Thus the y-intercept b = 0

Now, substituting m = 15 and b = 0 in the linear function

y = mx+b

y = 15x + 0

y = 15x

Therefore, the relation between the time and the distance will be:

y = 15x

The graph of the equation y = 15x is attached below.

Examples:

Calculate the distance in 1 second

put x = 1 in the equation

y = 15(1) = 15 meters

Calculate the distance in 10 second

put x = 10 in the equation

y = 15(10) = 150 meters

7 0
3 years ago
X2 - 10xy + 3y + y2 - 1 2 3 4 5
lesantik [10]

Answer:

Answer:  There are 5 (five terms) in the expression shown.

Step-by-step explanation:

_______________________________________________________

      In the expression shown:

___________________________________________________

         " x² − 10xy + 3y + y² − 1 " ;

___________________________________________________         

             →  These 5 (five terms) are:

______________________________________________

                  x² , -10xy,  3y,  y²,  and  -1 .

______________________________________________

5 0
3 years ago
The radius of a tire is 1.2 feet. How far will you travel after ten complete rotations of the tire?
Montano1993 [528]
Well you have to start of by finding the circumference of the tire, which you can do with the equation 2πr. If the radius is 1.2 feet, you just plug this into the equation to get 2.4π, which we will round to 7.5. After 10 rotations, you should've traveled approximately 75 feet
7 0
3 years ago
Read 2 more answers
14) Rounded to the nearest whole number, the square
Katen [24]

Answer:

3934

Step-by-step explanation:

Round 15,479,652 and find square root.

4 0
3 years ago
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