2 years ago

Which of the following is true of an organ?

Mathematics

2 answers:

kherson [118]2 years ago

8 0

A. An organ is the oldest keyboard instrument.

mamaluj [8]2 years ago

7 0

It's A because B is wrong, they are not all electronic. C is wrong, there are electric organs, steam organs and more. And D... really? They don't

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How much is 13,200 feet in miles

Naddika [18.5K]

Answer:

2.5 miles

Step-by-step explanation:

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2 years ago

Death Valley has an altitude that is below sea level. Which situation describes a hiker in Death Valley who hikes until he reach

Firdavs [7]

Answer: D

Step-by-step explanation:

Think of it logically: A and C are not below sea level so you can cross them out. And B doesn't work because if you decrease -10 by 10 you get -20. So, D is correct.

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2 years ago

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Curtis is twice as old as his brother Jonathan. Olivia is six years younger than Jonathan. The sum of their ages is 58 years.

liraira [26]

C=2 times j
c=2j
o=j-6
c+j+o=58

subsitte j-6 for o and 2j for c

2j+j+j-6=58
4j-6=58
add 6 to both sides
4j=64
divide both sides by 4
j=16

sub back

c=2j
c=2(16)
c=32

o=j-6
o=16-6
o=10

curtis=32
olivia=10
jonathan=16

equations are
c+j+o=58
c=2j
o=j-6

7 0

3 years ago

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If the measure of arc GH= 90° and the measure of arc EF= 45°, calculate m∠GDH.

user100 [1]

Answer:

∠ GDH = 67.5°

Step-by-step explanation:

The measure of the chord- chord angle GDH is half the sum of the measures of the arcs intercepted by the angle and its vertical angle.

∠ GDH = $\frac{1}{2}$ (GH + EF) = $\frac{1}{2}$ (90 + 45)° = 0.5 × 135° = 67.5°