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stellarik [79]
3 years ago
15

Pls do #13 pls pls pls

Mathematics
1 answer:
ivann1987 [24]3 years ago
7 0

y = 7

Simplifying numerators/ denominators

\frac{1+3}{-1+3} = \frac{y-1}{2+1}

\frac{4}{2} = \frac{y-1}{3}

2 = \frac{y-1}{3} (cross- multiply )

y - 1 = 6 ( add 1 to both sides )

y = 7


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PLEASE I NEED HELP FAST!!!! :(
USPshnik [31]

Answer:

Slide/Transformation

Step-by-step explanation:

If you slide the rectangle, it would fit in the new coordinates. You might have to slide it multiple directions.

Plz mark brainliest!! :P

3 0
3 years ago
Solve for unknown: 45/15=R/9
lora16 [44]

~~~~~~~\dfrac{45}{15} = \dfrac{R}9\\\\\\\implies \dfrac{R}9 = 3\\\\\\\implies R = 9 \times 3\\\\\\\implies R =27

8 0
2 years ago
Solve for x in the equation x^2 - 8x + 40 = 0​
laiz [17]

Answer:

Conclusion : Trinomial can not be factored

Step-by-step explanation:

5 0
3 years ago
Jack is flying his kite . He runs 100 feet away from his house and lets out 45 feet of string . The angle of elevation from the
fiasKO [112]

Answer: 125.80 ft

Step-by-step explanation:

Asuming the described situation is as shown in the figure below, we need to find the distance h between the kite and Jacks house, but first we need to find the x, y and then d.

How?

We will use trigonometry, especifically the trigonometric functions sine and cosine:

For y:

sin(65 \°)=\frac{y}{45 ft} (1)

Where y is the opposite side to the angle and 45 ft the hypotenuse.

Isolating y:

y=40.78 ft (2)

For x:

cos(65 \°)=\frac{x}{45 ft} (3)

Where x is the adjacent side to the angle.

Isolating x:

y=19.017 ft (4)

Finding d:

d=x+100 ft (5)

d=19.017 ft +100 ft

d=119.017 ft (6)

Now that we have found these values, we have to work with a bigger triangle, where the hypotenuse is the distance between the kite and Jack's house h and the sides are the values calculated in (4) and (6).

So, in this case we will use the <u>Pithagorean theorem</u>:

h^{2}=y^{2} +d^{2} (7)

Isolating h and writing with the known values:

h=\sqrt{y^{2} +d^{2}} (8)

h=\sqrt{(19.017 ft)^{2} +(119.017 ft)^{2}} (9)

h=125.80 ft This is the distance between the kite and the house

3 0
3 years ago
Please help !
yuradex [85]

Answer:

x = 5.85

Step-by-step explanation:

Given that,

One angle = 26°

Middle angle = 90°

Third angle = 180-(90+26) = 64°

Height, H = 12

We need to find the value of x. Using trigonometry to find it such that,

\tan64=\dfrac{12}{x}\\\\x=\dfrac{12}{\tan(64)}\\\\x=5.85

So, the value of x is equal to 5.85.

8 0
3 years ago
Read 2 more answers
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