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3 years ago

Help with #8 please

Mathematics

1 answer:

Ahat [919]3 years ago

5 0

Answer: (2) p=67 and q=15

Step-by-step explanation:

If you 82 and 31 together you would get 113 and you know that a triangle equals 180° so you take 180-113 and you get 67. You do the same for the other triangle you take a 98° and the new angle which is 67 and add them together and you get 165 so then you get 180 which is your overall triangle degree and subtract 165 from it and you get 15 which is Q, angle Q equals 15°

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Determine whether the number is rational or irrational: -21*

timofeeve [1]

Answer:

Rational

Step-by-step explanation:

Pi is a rational number

6 0

2 years ago

Quick question if I had a problem that was sin x = 18.9/20 =.945 how would I inverse sin of both sides ?

galben [10]

Answer:

The result is about 70.9 degrees

Step-by-step explanation:

Easy for a calculator. If you're not using a calculator, it's much more tedious!

There is an inverse sine key on your calculator, but you may have to press a key (likely labeled 2nd or INV) first. The attached image shows a TI-83 display. To get the inverse sine, I first pressed the yellow 2nd key, then the sin key.

Check MODE first to make sure you're measuring angles in degrees (if that's what you want!). Some calculators display angle mode with a small letter at the top of the display, D, R, or G usually.

The left side of the equation produces just x.

$\sin{x}=.945\\\\\sin^{-1}(\sin{x})=\sin^{-1}(.945)\\x=\sin^{-1}(.945) \approx 70.9^\circ$

6 0

2 years ago

65 over 100 of what number is 780

skad [1K]

Step-by-step explanation:

$\frac{65}{100} \times x = 780 \\ \\ \therefore \: x = 780 \times \frac{100}{65} \\ \\ \therefore \: x = 60 \times \frac{100}{5} \\ \\ \therefore \: x = 60 \times 20 \\ \\ \therefore \: x = 1200 \\$

Hence, 65 over 100 of 1200 is 780.

8 0

3 years ago

What is 4901 and 75 estimated to

yarga [219]

Answer:

5000 and 100

Step-by-step explanation:

5 0

3 years ago

Find the surface area of the composite solid.

Scilla [17]

Answer with Step-by-step explanation:

The given figure is a cuboid.

We know that surface area(S) of cuboid is given by:

S=2(lb+bh+hl)

Where l is the length, b is the breath and h is the height

Here, l=12 mm

b=6 mm

and h=(7+2) mm=9 mm

Surface Area= 2(12×6+6×9+9×12)

=2(72+54+108)

= 2×234

= 468 mm²

Hence, Correct option is:

C. 468 mm squared

4 0

3 years ago