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3 years ago

9

What is the value of?

1 answer:

katrin [286]3 years ago

8 0

Answer:

70 degrees

Step-by-step explanation:

Since the angles of a triangle have to add up to 180 degrees, you know that the third angle of the triangle on the left would be 180 - 60 - 65 = 55 degrees. Then, since the angles on a straight line have to add up to 180 degrees you could find one of the two missing angles of the second triangle by doing

180 - 55 - 50 = 75.

Then, you have 2 out of the 3 angles of the triangle on the right and you can find the third, the ?, by doing 180 - 75 - 35 = 70 degrees

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If a: b = 2:3, b: c = 4:3, and c: d = 7: 8, find a: d.

Taya2010 [7]

Answer:

a:d=7:9

Step-by-step explanation:

We have a system with 3 equation:

$\frac{a}{b}=\frac{2}{3}\\\frac{b}{c}=\frac{4}{3}\\\frac{c}{d}=\frac{7}{8}$

If we multiply all of these equations, then we have:

$\frac{a}{b}*\frac{b}{c}*\frac{c}{d}=\frac{2}{3}*\frac{4}{3}*\frac{7}{8}\\\frac{a*b*c}{b*c*d}=\frac{2*4*7}{3*3*8}\\\frac{a}{d}=\frac{56}{72}$

If we simplify this fraction dividing by 9, then:

$\frac{a}{d}=\frac{56:9}{72:9}=\frac{7}{9}$

Therefore, a:d=7:9

3 0

3 years ago

Please help I'm stuck on this question! worth 15+ points!!

zvonat [6]

Answer:

152

Step-by-step explanation:

360-(118+54)

3 0

2 years ago

Read 2 more answers

PLEASE!!! I'LL GIVE YOU MY HOUSE IF YOU CAN ANSWER THIS!!! PLUS BRAINLIEST ANSWER! Y= 1\2x-2. COMPLETE THE ORDERED PAIRS (2,_) (

Reptile [31]

Plug each x-value into the equation to get the y-value:

$\frac{1}{2} (2)-2=1-2=-1$

(2,-1)

$\frac{1}{2} (0)-2=0-2=-2$

(0,-2)

8 0

3 years ago

What's the range of the function y= -2(2)^x+2

Aleksandr [31]

Answer:

Step-by-step explanation:

Simply substitute the x and y values into the equation, Infinity is a number that gets closer & closer to zero and the y-intercept is always 2.

Infinity is a number that gets closer & closer to zero and the y-intercept is always 2.

y=-2(2)(-infity)+2

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4 0

2 years ago

There are two thousand girls and one thousand boys at a university.For every girl with glasses there are two boys who were glass

e-lub [12.9K]

Answer:

200

Step-by-step explanation:

2000 girls :1000 boys

2000 +1000 =3000

20% of 3000 = 600

I girl : 2 boys

1+2=3

600÷3 = 200

200 boys wore glasses

4 0

3 years ago