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2 years ago

Simplify the expression -3z(1.8z-2.2).

Mathematics

1 answer:

alexdok [17]2 years ago

5 0

Answer:

$- 5.4z {}^{2} + 6.6z$

Step-by-step explanation:

Given:

$-3z(1.8z-2.2)$

Solution:

Applying Distributive property,we obtain

$(−3z)(1.8z)+(−3z)(−2.2)$

Simplifying using PEMDAS:

$- 5.4z {}^{2} + 6.6z$

Done!

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How do you determine the number of zeros to annex in the product of 0.002 and 0.003?

tatyana61 [14]

Okay so, 0.005,..................

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3 years ago

The points (8,18) and (24,54) form a proportional relationship. Find the slope of the line through the

stiks02 [169]

Answer:

slope

m= $\frac{9}{4}$

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3 years ago

Read 2 more answers

1. m+ 10< 16

sleet_krkn [62]

Answer:

$1.\ m$

Step-by-step explanation:

1. Subtract 10 from both sides. Then:

$m+ 10< 16\\ m+ 10-10< 16-10\\m$

2. Divide both sides by -2. Notice that the direction of the symbol of the inequality will change. Then:

$-2g\geq8\\\\\frac{-2g}{-2}\geq\frac{8}{-2}\\\\g\leq-4$

3. Add 22 to both sides. Then:

$y-22< 19\\ y-22+22$

4. Divide both sides by -7. Notice that the direction of the symbol of the inequality will change. Then:

$-7b>-28\\\\\frac{-7b}{-7}>\frac{-28}{-7}\\\\b$

5. Subtract 30 from both sides. Then:

$h+30$

6. Divide both sides by -5. Notice that the direction of the symbol of the inequality will change. Then:

$-5x$

7. Subtract 13 from both sides. Then:

$t+13>22\\ t+13-13>22-13\\t>9$

8. Add 12 to both sides. Then:

$w-12< 16\\ w-12+12$

7 0

3 years ago

Billy thinks of a number that is not zero.

ELEN [110]

The answer could be negative or positive. We are not given specific as to whether or not the starting number is positive or negative so therefore it could be either.
Hope this is helpful :)

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2 years ago

Read 2 more answers

Farmer Ed has 8,000 meters of fencing & wants to enclose a rectangular plot that borders a river. If farmer Ed does not fenc

attashe74 [19]

Answer:

largest area that can be enclosed = 8,000,000 m²

Step-by-step explanation:

Since it is a rectangle plot, the area is expressed as; A = xy, where x is length and y is width.

Because it is next to the river, he only needs to fence three sides, so amount of fencing; F = x + 2y.

Since we know the amount of fencing available is 8000m, we get:

8000 = x + 2y

solving for x, we have;

x = 8000 - 2y

substitute 8000 - 2y for x into the area equation to give;

A = (8000 - 2y)y distribute

A = -2y² + 8000y

Now, due to the negative sign next to 2, this will be a parabola which opens down, meaning that the point of maximum area will be at the vertex,

Thus; y = -b/2a = -8000/[2(-2)] = 2000

x = 8000 - 2(2000) = 4000

A = 4000(2000) = 8,000,000 m²

8 0

3 years ago