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3 years ago

Brenda and Micheal simplify the expression, as shown below.

Mathematics

1 answer:

Marina86 [1]3 years ago

6 0

Answer:

it looks like brenda did

Step-by-step explanation:

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Every person at a party of twenty eight people said hello to each of the other people at the party once. How many "hellos" were

Mrac [35]

Answer:

756 hellos

Step-by-step explanation:

Each 28 persons say hello once to every 27 persons

So, 28 × 27= 756

3 0

3 years ago

PLEASE HELP Simplify an expression <br><br> (X2y4z)5/ (Xy)2

Andrej [43]

Answer:

x^8 y^18 z^5

Step-by-step explanation:

Look at The image below

4 0

3 years ago

Read 2 more answers

z varies jointly with x and y. If x = 2, y = 3, and z = 4, write the variation equation and find z when x = −6 and y = 2.

gregori [183]

Step-by-step explanation:

that means

z = k×x×y

4 = k×2×3 = k×6

k = 4/6 = 2/3

so, when x = -6 and y = 2, we get

z = 2/3 × -6 × 2 = 2 × -2 × 2 = -8

7 0

2 years ago

Emir is standing in a treehouse and looking down at a swingset in the yard next door. The angle of depression from Emir's eyelin

erma4kov [3.2K]

Answer:

15 feets

Step-by-step explanation:

From. Trigonometric relation :

Tanθ = opposite / Adjacent

Tan 33.69 = 10 / x

0.6666649 = 10 / x

x = 10 / 0.6666649

= 15 feets

Hence, base of tree to swingset is 15 feets

3 0

3 years ago

Read 2 more answers

What is the equation of this line in standard form?

Fiesta28 [93]

keeping in mind that standard form for a linear equation means

• all coefficients must be integers, no fractions

• only the constant on the right-hand-side

• all variables on the left-hand-side, sorted

• "x" must not have a negative coefficient

$\bf (\stackrel{x_1}{-3}~,~\stackrel{y_1}{-1})\qquad (\stackrel{x_2}{\frac{1}{2}}~,~\stackrel{y_2}{2}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{2}-\stackrel{y1}{(-1)}}}{\underset{run} {\underset{x_2}{\frac{1}{2}}-\underset{x_1}{(-3)}}}\implies \cfrac{2+1}{\frac{1}{2}+3}\implies \cfrac{3}{\frac{1+6}{2}}\implies \cfrac{\frac{3}{1}}{~~\frac{7}{2}~~}\implies \cfrac{3}{1}\cdot \cfrac{2}{7}\implies \cfrac{6}{7}$

$\bf \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-1)}=\stackrel{m}{\cfrac{6}{7}}[x-\stackrel{x_1}{(-3)}]\implies y+1=\cfrac{6}{7}(x+3) \\\\\\ \stackrel{\textit{multiplying both sides by }\stackrel{LCD}{7}}{7(y+1)=7\left( \cfrac{6}{7}(x+3) \right)}\implies 7y+7=6(x+3)\implies 7y+7=6x+18 \\\\\\ 7y=6x+11\implies -6x+7y=11\implies 6x-7y=-11$

3 0

3 years ago