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2 years ago

2.7-2.5= What does this equal?

Mathematics

2 answers:

LiRa [457]2 years ago

4 0

Answer:

It is 0.2

Step-by-step explanation:

$7 - 5 = 2$

$2 - 2 = 0$

$0.2$

Kryger [21]2 years ago

3 0

Answer:

0.2

Step-by-step explanation:

Treat it as normal subtraction

2 (/ 1) .7 (/ 17)

- 2 .5

-----

0.2

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1. Ivan bought three magazines for $6.50 each. The sales tax was 7%. What

Gnoma [55]

Answer:

I got 6.955

I would round and say he paid $6.96

Step-by-step explanation:

i multiplied 6.50 by 1.07

7 0

2 years ago

The Pave the Way Company is installing a new walkway. The installer uses 13 paving stones for every foot of walkway. He needs 11

Vladimir [108]

Hey There!

The answer would be 3 Feet!

Solution-

1) 117-78= 39

2) One foot is 13 paving stones.

3)39/13= 3 feet

Thus, your answer is 3 feet

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3 0

2 years ago

Match the parabolas represented by the equations with their foci.

Elenna [48]

Function 1 $f(x)=- x^{2} +4x+8$

First step: Finding when $f(x)$ is minimum/maximum
The function has a negative value $x^{2}$ hence the $f(x)$ has a maximum value which happens when $x=- \frac{b}{2a}=- \frac{4}{(2)(1)}=2$ . The foci of this parabola lies on $x=2$ .

Second step: Find the value of y-coordinate by substituting $x=2$ into $f(x)$ which give $y=- (2)^{2} +4(2)+8=12$

Third step: Find the distance of the foci from the y-coordinate
$y=- x^{2} +4x+8$ - Multiply all term by -1 to get a positive $x^{2}$
$-y= x^{2} -4x-8$ - then manipulate the constant of y to get a multiply of 4
$4(- \frac{1}{4})y= x^{2} -4x-8$
So the distance of focus is 0.25 to the south of y-coordinates of the maximum, which is $12- \frac{1}{4}=11.75$

Hence the coordinate of the foci is (2, 11.75)

Function 2: $f(x)= 2x^{2}+16x+18$

The function has a positive $x^{2}$ so it has a minimum

First step - $x=- \frac{b}{2a}=- \frac{16}{(2)(2)}=-4$
Second step - $y=2(-4)^{2}+16(-4)+18=-14$
Third step - Manipulating $f(x)$ to leave $x^{2}$ with constant of 1
$y=2 x^{2} +16x+18$ - Divide all terms by 2
$\frac{1}{2}y= x^{2} +8x+9$ - Manipulate the constant of y to get a multiply of 4
$4( \frac{1}{8}y= x^{2} +8x+9$

So the distance of focus from y-coordinate is $\frac{1}{8}$ to the north of $y=-14$
Hence the coordinate of foci is (-4, -14+0.125) = (-4, -13.875)

Function 3: $f(x)=-2 x^{2} +5x+14$

First step: the function's maximum value happens when $x=- \frac{b}{2a}=- \frac{5}{(-2)(2)}= \frac{5}{4}=1.25$
Second step: $y=-2(1.25)^{2}+5(1.25)+14=17.125$
Third step: Manipulating $f(x)$
$y=-2 x^{2} +5x+14$ - Divide all terms by -2
$-2y= x^{2} -2.5x-7$ - Manipulate coefficient of y to get a multiply of 4
$4(- \frac{1}{8})y= x^{2} -2.5x-7$
So the distance of the foci from the y-coordinate is - $\frac{1}{8}$ south to y-coordinate

Hence the coordinate of foci is (1.25, 17)

Function 4: following the steps above, the maximum value is when $x=8.5$ and $y=79.25$ . The distance from y-coordinate is 0.25 to the south of y-coordinate, hence the coordinate of foci is (8.5, 79.25-0.25)=(8.5,79)

Function 5: the minimum value of the function is when $x=-2.75$ and $y=-10.125$ . Manipulating coefficient of y, the distance of foci from y-coordinate is $\frac{1}{8}$ to the north. Hence the coordinate of the foci is (-2.75, -10.125+0.125)=(-2.75, -10)

Function 6: The maximum value happens when $x=1.5$ and $y=9.5$ . The distance of the foci from the y-coordinate is $\frac{1}{8}$ to the south. Hence the coordinate of foci is (1.5, 9.5-0.125)=(1.5, 9.375)

8 0

2 years ago

What is 128/23 i want you to explain the most complex way as you can!

Alborosie

Divide the fraction gives you an irrational number since the decimal goes on forever but since the decimal can be written as a "fraction or ratio" it is rational.

Best of Luck!

4 0

2 years ago

Read 2 more answers

Eric prepared 45 kilograms of dough after working 9 hours. How many hours did Eric work if he prepared 55 kilograms of dough? As

EastWind [94]

45 / 9 = 5

55 / 5 = 11

Eric worked 11 hours to prepare 55 kilograms of dough.

4 0

2 years ago