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3 years ago

Answer quickly please! Best, most accurate answer gets brainliest.

Mathematics

2 answers:

goldfiish [28.3K]3 years ago

8 0

Answer:

Step-by-step explanation:

In this question, we want to evaluate the expression "9z-4" for z=3.

This means, we want to calculate the result when we substitute the z in this expression for 3.

So we have: 9(3)-4, which is equal to 23.

Let me know if this helps!

Nastasia [14]3 years ago

3 0

Answer:

A. 23

Step-by-step explanation:

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Solve this linear system by graphing <br> 1/2x-y=4<br> 2y=x+6

tamaranim1 [39]

\left[x \right] = \left[ 18\,y\right][x]=[18y] graphic .

4 0

3 years ago

the angle of elevation of the top of a tree from a distance of 1000 ft is 25 degrees. how tall is the tree?

pickupchik [31]

Answer:

466.30 ft

Step-by-step explanation:

Given in the question,

the angle of elevation of the top of a tree from ground = 25°

horizontal distance between angle of elevation and tree = 1000ft

To find,

height of tree( vertical distance from ground to top of tree)

As we can presume for the question that the whole scenario makes a right angle triangle. So, we will use trigonometry functions

Tan Δ = opposite / adjacent

Tan25°= height / 1000

height = 1000 * Tan25°

height = 1000 * 0.466

height = 466.30 ft

So, the height of tree = 466.30 ft

6 0

4 years ago

A pool of linen container 100 meters. three butete brought 15.75 meters, 22.50 meters and 12.25 meters respectively. how many me

Nitella [24]

Answer:

49.5 meters of linen were left after the sale.

Step-by-step explanation:

Given that there are 100 meters of linen

And 15.75, 22.50 and 12.25 meters are sold.

This means that the sold linen has to be added to find the total linen sold.

And then the quantity of sold linen will be subtracted from 100 to find the meters of linen left.

$Total\ linen\ sold = 15.75+22.50+12.25 = 50.5\ meters$

Left linen will be:

$=100-50.5 = 49.5$

Hence,

49.5 meters of linen were left after the sale.

6 0

3 years ago

Which is the value of this expression when a=-2 and b=-3

Lerok [7]

Answer:

$\frac{729}{64}$

Step-by-step explanation:

The given expression is

$(\frac{3a^{-3}b^{2} }{2a^{-1} b^{0} } )^{2}$

Where $a=-2$ and $b=-3$ .

When we say "evaluate the expression" refers to replacing the given values in the expression. Then, we solve each power in the numerator and denominator. After that, we solve each product in the fraction. At the end, we apply the square power. As follows

$(\frac{3a^{-3}b^{2} }{2a^{-1} b^{0} } )^{2}=(\frac{3(-2)^{-3}(-3)^{2} }{2(-2)^{-1} (-3)^{0} } )^{2}=(\frac{3(\frac{1}{-8})(9)}{2(\frac{1}{-2} (1))} )^{2} =(\frac{-\frac{27}{8} }{-1} )^{2} =\frac{27^{2} }{8^{2} } =\frac{729}{64}$

3 0

3 years ago

PLEASE HELP!!!!???: Simplify the expression 13 + (14 + x).

pantera1 [17]

Answer:

27+ x

Step-by-step explanation:

4 0

4 years ago

Read 2 more answers