Answer:
(a) By cosine rule, /PQ/2=202+152−2×20×15×cos145°
= 400+225−600cos145°
= 625+600×0.8192
= 491.52+625
/PQ/2=1116.52⟹/PQ/=1116.52−−−−−−√=33.41
≊33km ( to the nearest whole number)
(b) By sine rule,
sin<QPR15=sin14533.41
sin<QPR=15sin14533.41
sin<QPR=15×0.573633.41=0.2575
<QPR=14.92°
∴ Bearing of Q from P = 25° + 14.92° = 39.92°.
≊40° (to nearest whole number)
Step-by-step explanation:
hope it helps
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Answer:
3f -9g +7
Step-by-step explanation:
(–3f – 4g + 9) – (2 – 6f + 5g)
Distribute the minus sign
(–3f – 4g + 9) – 2 + 6f - 5g
I like to line them up vertically
–3f – 4g + 9
+ 6f - 5g -2
------------------------
3f -9g +7
It depends on the question given, for example
you can do distributive property will multiplying.
Example 1:
there is two ways on doing distributive property.
I can do 4(8+3)
add 8+3 since it is inside the parenthesis which equals = 11 then multiply the outside on what you added. 4x11= 44
example 2: I can also do it another way. 4(8+3) distribute the 4 by multiplying the 4 with both numbers. 4x8 and 4x3 which equals 32, and 12. add 32+12=44
so either way you will get the same answer. hope I helped.
Answer:
20°
Step-by-step explanation:
By inscribed angle theorem:
(Measure of inscribed angle is half of the measure of intercepted arc. )
Answer:
Step-by-step explanation:
1) Convert to Standard Form:
9.29 * 10^7 = 92900000
4.8388 * 10^8= 483880000
2) Subtract 483880000 from 92900000.
3) Convert the difference into scientific notation.
<em>C would be your best choice.</em>
