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ddd [48]
4 years ago
14

Given log43=0.792 and log421=2.196,what is log47?

Mathematics
1 answer:
IRISSAK [1]4 years ago
8 0

Answer:

1.404

Step-by-step explanation:

Using the rule of logarithms

log x - log y ⇔ log(\frac{x}{y} )

Hence

log_{4} 21 - log_{4} 3 = log_{4}(\frac{21}{3} = log_{4} 7

Thus

log_{4} 7 = 2.196 - 0.792 = 1.404

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Tom, Mary and Bill are aged 10,12 and 15 years respectively. They share 259 euros in the same ratio as their ages. Find how much
tigry1 [53]

Answer:

70 , 84 , 105

Step-by-step explanation:

sum their ages , 10 + 12 + 15 = 37

divide the amount by this sum to find the value of one part of the ratio.

259 ÷ 37 = 7 ← value of 1 part of the ratio , then

10 parts = 10 × 7 = 70 euros ← Tom's share

12 parts = 12 × 7 = 84 euros ← Mary's share

15 parts = 15 × 7 = 105 euros ← Bill's share

7 0
2 years ago
A square has a diagonal length of 5 cm. The area of the squareiscm2. Round answer to the nearest tenths ifneeded.
Whitepunk [10]
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6 0
1 year ago
Graph the line.<br> y + 4x=8
const2013 [10]
Y-Intercept =(−8)
Go to the graph and plot the point the point (0,−8) on the y-axis.
Then rise 4 and run 1. Plot the point (1,−4)
Then again "rise 4" and then "run" 1. Plot the point (2,0)
6 0
4 years ago
Read 2 more answers
What is it !, help !
Gala2k [10]

Answer:

an isosceles triangle

Step-by-step explanation:

it has two equal sides so this is isosceles triangle

7 0
3 years ago
Which method would be more efiicient to solve the system y=1/2x and 2x+3y=28
Licemer1 [7]
Probably the subsitution method


y=1/2x
subsitute that fr y

2x+3(1/2x)=28
2x+3/2x=28
times 2 both sides
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divide by 7 both sides
x=8
sub back

y=1/2x
y=1/2(8)
y=4

(x,y)
(8,4)
6 0
3 years ago
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