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3 years ago

19= 7z -2z -------------

Mathematics

2 answers:

Nata [24]3 years ago

8 0

Answer:

z = 3.8

Step-by-step explanation:

19 = 7z - 2z

19 = 5z

19/5 = z

3.8 = z

MrRissso [65]3 years ago

3 0

Answer:

19 = 7z - 2z

19 = 5z

z = 19/5

Hope this helps!

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2(x+3)=2x+6 how many solutions dose it have

LekaFEV [45]

Answer:

The right side of the equation is only a different way of writing the left side, so any value of x will solve this equation.

The equation − 2 ( x + 3 ) = − 2 x − 6 does not have any specific solutions for the simple reason that the left and rigth sides are two representations of the same equation.

We have − 2 ( x + 3 ) means that each term inside the parenthesis should be multiplied with − 2 , i.e.

− 2 ( x + 3 ) = − 2 ⋅ x − 2 ⋅ ( + 3 ) = − 2 x − 6

Which is exactly what the right side says.

Any value of x will, therefore, fulfill this equation.

4 0

3 years ago

20 points! Write an exponential function in the form y=ab^x that goes through points (0, 8) and (2, 200)

alexandr402 [8]

Answer:

$y=8(5)^x$

Step-by-step explanation:

We want an exponential function that goes through the two points (0, 8) and (2, 200).

Since a point is (0, 8), this means that y = 8 when x = 0. Therefore:

$8=a(b)^0$

Simplify:

$a=8$

So we now have:

$y = 8( b )^x$

Likewise, the point (2, 200) tells us that y = 200 when x = 2. Therefore:

$200=8(b)^2$

Solve for b. Dividing both sides by 8 yields:

$b^2=25$

Thus:

$b=5$

Hence, our exponential function is:

$y=8(5)^x$

4 0

3 years ago

Read 2 more answers

Write a slope intercept form equation through given points . (18, 14), (-6, -19)

Kobotan [32]

Answer:

y-14=11/8(x-18)

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-19-14)/(-6-18)

m=-33/-24

m=33/24

simplify

m=11/8

y-14=11/8(x-18)

6 0

3 years ago

4. An oil palm plantation uses fertiliser at a rate of 350 kg per hectare. State the rate of

otez555 [7]

Answer:

Step-by-step explanation:

1kg= 1000g

1 hectare = 10 000 m²

1 kg/hct = 1000/10 000 g/m²

1 kg/hct = 1 / 10 g/m²

350 kg per hectare is equal to 350 / 10 = 35 g/m²

7 0

3 years ago

Pls help! will mark branliest!!! :)

Ket [755]

The area of the house is the amount of space on the house.

The length of the addition is x + 20
The area of the original house is $x^2 + 30x + 200$

<h3>The length of the addition</h3>

The area of the addition is given as:

$Area = x^2 + 10x - 200$

Expand

$Area = x^2 + 20x - 10x - 200$

Factorize

$Area = x(x + 20) - 10(x + 20)$

Factor out x + 20

$Area = (x -10)(x + 20)$

The width of the addition is x - 10.

Hence, the length of the addition is x + 20

<h3>The area of the original house</h3>

The dimension of the original house is

x + 20 by x + 10

So, the area is:

$Area =(x + 20)(x + 10)$

Expand

$Area =x^2 + 20x + 10x + 200$

This gives

$Area =x^2 + 30x + 200$

Hence, the area of the original house is $x^2 + 30x + 200$