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Nimfa-mama [501]

2 years ago

13

A 12 _ foot ladder is leaning against a house the ladder reaches 7.7 feet up the wall wha is the angle of elevation of the ladde

r?

1 answer:

fgiga [73]2 years ago

3 0

Check the picture below.

Make sure your calculator is in Degree mode.

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4. Elena noticed that, nine years ago, her cousin Katie was twice as old as Elena was then,

kakasveta [241]

Answer:

k - 2e + 9 = 0

k - e - 4 = 0

Step-by-step explanation:

Given that Elena is currently e years old and Katie is k years old. Now, nine years ago, Katie was twice as old as Elena was.

So, k - 9 = 2(e - 9)

⇒ k - 2e + 9 = 0 .............. (1)

And, in four years, Elena will be as old as Katie is now.

So, k = e + 4

⇒ k - e - 4 = 0 ............... (2)

Therefore, the equations (1) and (2) matches the conditions. (Answer)

4 0

3 years ago

Jewel is 7 years old and John is 16 years younger than Dave. One year ago, Dvae's age was twice the sum of Jewel's and John's ag

ivanzaharov [21]

Answer:

Jewel is 7 years old

John is 1 year old

Dave is 17 years old

Step-by-step explanation:

From the question we are told that:

Jewel age is $J=7 years$

John age $J'=(D-16)years$

Dave's age a Year ago

$D-1=2(J-1+J'-1)$

So that Dave.s age this Year could be

$D=2((J-1)+(J'-1))+1$

Simplifying Equation for Dave's age we have

$D=2((7)-1+(D-16)-1)+1$

$D=2(6+D-15)+1$

$D=2(D-9)+1$

$D=2D-18+1$

$D=17 Years$

Dave is 17 years old

Therefore

Johns age is

$J'=(D-16)$

$J'=17-16$

$J'=1year old$

John is 1 year old

7 0

3 years ago

Which expresión is equvalient yo 810-210+20+20

andrezito [222]

Answer:

640

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Anyone know how to solve this?

yuradex [85]

Answer:

<h2> $\frac{16}{25}$ </h2>

Step-by-step explanation:

<h3> $( - \frac{4}{5})^{2}$ </h3><h3> ${( - 1)}^{2} \frac{ {4}^{2} }{ {5}^{2} }$ </h3><h3> $1 \frac{ {4}^{2} }{ {5}^{2} }$ </h3><h3> $\frac{ {4}^{2} }{ {5}^{2} }$ </h3><h3> $\frac{16}{25}$ </h3><h3>Hope it is helpful....</h3>

5 0

3 years ago

What is a 90-degree rotation on a graph.

Oksanka [162]

Rotation of a point through 90-degree is about he origin in clockwise direction when point M(h,k) is rotated about the origin O through 90-degree in clockwise direction

4 0

3 years ago