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Debora [2.8K]
3 years ago
6

PLEASEEEEEEEEEEEE HELP PLZZZZZZ PRETTY PLZZZZZZZZZZZZ

Mathematics
1 answer:
koban [17]3 years ago
7 0

Answer:

the last one

Step-by-step explanation:

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What is an equation of the line that is perpendicular to y+1=-3(x-5) and passes through the point 4,-6
Oliga [24]

Answer:

y=\frac{1}{3}x-\frac{16}{3}

Step-by-step explanation:

Arranging the given equation in slope-intercept form ( y = mx + b ):

y+1=-3(x-5)\\y+1=-3x+15\\y=-3x+15-1\\y=-3x+14

<em>We know that the perpendicular line would have a slope (m) that is </em><em>negative reciprocal </em><em>of this (\frac{1}{3}). Thus we can write the perpendicular line's equation as  y=\frac{1}{3}x+b. </em>

<em />

<em>Now putting x = 4 and y = -6 into the equation, we can solve for b:</em>

<em>y=\frac{1}{3}x+b\\-6=\frac{1}{3}(4)+b\\-6=\frac{4}{3}+b\\b=-6-\frac{4}{3}\\b=-\frac{16}{3}</em>

<em />

Thus, the equation of the perpendicular line is  y=\frac{1}{3}x-\frac{16}{3}

6 0
3 years ago
Read 2 more answers
4. Find the lateral area and surface area of the given prism.
scoundrel [369]

Answer:

<h2>Q4. S.A. = 752.28 m²</h2><h2>Q11. V = 384 ft³</h2>

Step-by-step explanation:

\bold{Q4}\\\text{We have}\\\text{two right triangles with legs a = 4m and b = 7m}\\\text{three rectangles}\ 7m\ \times 38m,\ 8.06m\ \times\ 38m\ \text{and}\ 4m\ \times\ 38m\\\\\text{The formula of an area of a right triangle:}\\\\A=\dfrac{ab}{2}\\\\\text{substitute:}\\\\A_1=\dfrac{(4)(7)}{2}=\dfrac{28}{2}=14\ m^2\\\\\text{The formula of an area of a rectangle}\ l\ \times w:\\\\A=lw\\\\\text{substitute:}\\\\A_2=(7)(38)=266\ m^2\\A_3=(8.06)(38)=306.28\ m^2\\A_4=(4)(38)=152\ m^2\\\\\text{The Surface Area:}

S.A.=2A_1+A_2+A_3+A_4\\\\S.A.=2(14)+266+306.28+152=752.28\ m^2

\bold{Q11}\\(look\ at\ the\ picture)\\\\\text{The formula of a volume of a pyramid:}\\\\V=\dfrac{1}{3}BH\\\\B-\text{area of a base}\\H-\text{height}\\\\\text{In the base we have the square. The formula of an area of a square with side a:}\\\\A=a^2\\\\\text{We have}\ a=12ft.\ \text{Substitute:}\\\\B=12^2=144\ ft^2\\\\\text{For}\ H\ \text{we need use the Pythagorean theorem:}\\\\H^2+6^2=10^2\\\\H^2+36=100\qquad\text{subtract 36 from both sides}\\\\H^2=64\to H=\sqrt{64}\\\\H=8\ m

\text{Substitute:}\\\\V=\dfrac{1}{3}(144)(8)=(48)(8)=384\ ft^3

5 0
3 years ago
Help fast! 50 points!<br> How is 7.85  irrational, explain the steps.
Rufina [12.5K]

An irrational number cannot be expressed as a ratio between two numbers so putting a decimal makes it irrational

3 0
3 years ago
Choose the correct simplification of the following:<br> (2x^2 + x - 1) - (x^2 + 3x – 5)
yKpoI14uk [10]

Answer:

x^2 - 2x + 4

Step-by-step explanation:

6 0
2 years ago
[ZA WARUDO] stops time and throws 200 knives at Jotaro Kujo. Then he adds one more and summons a ROAD ROLLER DA And smashes jota
Lubov Fominskaja [6]

Answer:

169 knives

Step-by-step explanation:

What we know:

ZW threw 200 knives at Jotaro, then adds one more. This makes 201 knives, initially.

However, the RRD subtracts 32 from 201, making it 169 knives that ZW threw.

201 - 30 - 2 = 171 - 2 = 169 knives

8 0
2 years ago
Read 2 more answers
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