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Brilliant_brown [7]
3 years ago
8

Estimate the difference by rounding off to nearest tens . 6723 - 751

Mathematics
1 answer:
DiKsa [7]3 years ago
4 0

Answer:

5972    5970

Step-by-step explanation:

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One book costs £2.98. how much do 4 books cost?
DaniilM [7]
The answer to this would be 11.82
7 0
4 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
Kitty [74]

Answer:   (-2, 5) and (2, -3)

<u>Step-by-step explanation:</u>

Graph the line y = -2x + 1 (which is in y = mx + b format) by plotting the y-intercept (b = 1) on the y-axis and then using the slope (m = -2) to plot the second point by going down 2 and right 1 unit from the first point:

        y - intercept = (0, 1)            2nd point = ( -1, 1).

Graph the parabola y = x² - 2x - 3 by first plotting the vertex and then plotting the y-intercept (or some other point):

y = x^2-2x-3\quad \rightarrow \quad a=1,\ b=-2,\ c=-3\\\\\text{axis of symmetry:}\ x = \dfrac{-b}{2a}\ \longrightarrow \ x=\dfrac{-(-2)}{2(1)}=\dfrac{2}{2}=1\\\\\text{y-value of vertex:}\ f(1) = (1)^2-2(1)-3\quad \longrightarrow \quad y = 1 - 2 - 3=-4\\\\\text{y-intercept:}\ f(0)= (0)^2-2(0)-3\ \longrightarrow \ y=0 - 0 - 3 = -3 \\

         vertex = (1, -4)                2nd point (y-intercept) = (0, -3)


<em>see attached</em> - the graphs intersect at two points:  (-2, 5) and (2, -3)


8 0
3 years ago
The correct answer is y &lt; 18. Let's pretend a student forgot to flip the symbol and they mistakenly believe the solution set
snow_tiger [21]

Answer:

It is wrong

Step-by-step explanation:

y < 18

This is read as y is less than 18. If the students forgot to flip the symbol and mistakenly believe that y > 18.

y > 18

This is read as y is greater than 18.

There is a difference between the numbers greater or less than 18 .

y must have numbers less than 18 and 21 is greater than 18.

Therefore it is wrong.

But to make it true we can multiply minus with the inequality y > 18

-y > -18

This reverses the inequality sign and it becomes

y< 18

The solution which is required.

4 0
3 years ago
X/2≤4 answer and on a number line
Dvinal [7]
X/2≤4
x≤8
x∈(-∞;8]
x is in range -∞ up to 8
3 0
3 years ago
PLS HELP ME FAST PLS !!!!!!!!!!!
erastova [34]

Answer:

The Answer is P = (-2.5 , 1 )

Step-by-step explanation:

Let, the point is P(x,y)

then, x=\frac{m_{1}x_{2}+ m_{2}x_{1}}{m_{1}+m_{2}}

     =>x=\frac{5*(-1)+ 3*(-5)}{5+3}

     ∴x=-2.5

Again, y=\frac{m_{1}y_{2}+ m_{2}y_{1}}{m_{1}+m_{2}}

     =>y=\frac{5*7+ 3*(-9)}{5+3}

     ∴y=1

Thus, P = (-2.5 , 1 )

6 0
3 years ago
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