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svp [43]
3 years ago
7

4x+7y= 28 solve for y Not a graphing question

Mathematics
1 answer:
Nuetrik [128]3 years ago
4 0
The answer I got was y=-4/7x +4
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A fire department's ladder is 110 feet long. A firefighter is trying to reach the top of a 100 foot building by leaning the ladd
Alekssandra [29.7K]

Answer:

sin-¹(10/11)

Step-by-step explanation:

The height of the building is 100 ft and the ladder is 110ft long .We can imagine this situation as a right angled ∆. For figure refer to the attachment .

  • We can use ratio sine here. Let the angle of elevation be theta.

<u>In </u><u>∆</u><u> </u><u>ABC </u><u>:</u><u>-</u><u> </u>

=> sinθ = p/h

=> sinθ = 100ft / 110 ft

=> sinθ = 10/11

=> θ = sin -¹ ( 10/11) .

<h3><u>Hence </u><u>the</u><u> </u><u>angle</u><u> of</u><u> elevation</u><u> </u><u>is </u><u>sin </u><u>-</u><u>¹</u><u> </u><u>(</u><u> </u><u>1</u><u>0</u><u>/</u><u>1</u><u>1</u><u>)</u><u>. </u><u> </u></h3>

6 0
3 years ago
Plz Help!!
DIA [1.3K]
I think the answer is 3/8 pounds. You multiply the 3/4 pounds by 1/2 because the recipie has been cut in half. Hope this helps!
3 0
3 years ago
A short-course meter pool is 25 meters long. A short-course yard pool is 25 yards long. Which one is longer and by how much (in
ch4aika [34]

Answer:

short course meter pool and its longer by 7.021 feet or 7.02 ft

Step-by-step explanation:

if you do 25 yards times 3 you get 75ft and if you covert 25 meters into ft you get 82.021 so sutract 82.02-75=7.02. Hope this helps ;-)

3 0
1 year ago
What is the equation?
zavuch27 [327]

Answer:

\displaystyle 5x + 6y = 72\:or\:y = -\frac{5}{6}x + 12

Step-by-step explanation:

Perpendicular equations have OPPOCITE MULTIPLICATIVE INVERCE <em>RATE OF</em><em> </em><em>CHANGES</em><em> </em>[<em>SLOPES</em>], so 1⅕ becomes −⅚, and we move forward with plugging the information into the Slope-Intercept formula:

\displaystyle -8 = -\frac{5}{6}[24] + b \hookrightarrow -8 = -20 + b; 12 = b \\ \\ \boxed{y = -\frac{5}{6}x + 12}

To write this in Linear Standard Form, perfourm he following:

y = −⅚x + 12

+ ⅚x + ⅚x

___________

⅚x + y = 12 [We cannot leave the equation this way, so multiply the equation by the denominatour to eradicate the fraction.]

6[⅚x + y = 12]

\displaystyle \boxed{5x + 6y = 72}

I am joyous to assist you at any time.

7 0
2 years ago
Solve for x: u = k + yx
zhannawk [14.2K]
X
=
u
y
−
k
y
is the answer
x= u/y - k/y
4 0
3 years ago
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