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saul85 [17]
3 years ago
15

If –2 and –5 are the roots of the equation ax + bx + 20 = 0, find the values of a and b.​

Mathematics
2 answers:
WITCHER [35]3 years ago
4 0

Answer:

a=2

b=14

Step-by-step explanation:

bearhunter [10]3 years ago
3 0

Step-by-step explanation:

a=2b=14.................

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A radioactive substance decays at a rate of 25% every 10 years. Which equation represents the amount of the substance (S) remain
Lelechka [254]

Answer:

y = 100 * (0.75)^{30

Step-by-step explanation:

Given

a =100 --- Initial Amount

r= 25\% every 10 years

Required

The remaining amount after 300 years

To do this, we make use of:

y = a(1 - r)^T

Where

r = decay rate

T = the period of decay

In 300 years, there are 30 periods of 10 years.

i.e.

T = \frac{300}{10}

T = 30

y = a(1 - r)^T

y = 100 * (1 - 25\%)^{30

y = 100 * (1 - 0.25)^{30

y = 100 * (0.75)^{30

3 0
3 years ago
Can someone tell me the procesa of a ratio 6th grade math plzzz
adoni [48]
A ratio reads left to right and can be written in 3 different ways. for example, 3:5, 3 to 5, or 3/5
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8 0
3 years ago
Can i get its answer?​
Komok [63]

Yo sup??

perimeter=2(l+b)

100=2(35+b)

b=15 cm

area=b*h

=35*15

=525 cm²

Hope this helps

4 0
3 years ago
Read 2 more answers
Tasha is planning an expansion of a square flower garden in a city park. If each side of the original garden is increased by 7 m
12345 [234]
To find the original length you must take away the add-ons. To do so we know that they added 7 and A= l*l (or l squared). They added the 7 to the length so multiply 7*7 (49) subtract your answer from 169 (120) and that's your new area. To find the original length divide by 4 (I believe) and get 30m2
5 0
3 years ago
Albert bought some fish at a grocery store at $2 per pound for salmon and $4 per pound for catfish. He spent a total of $12 on s
Gemiola [76]

Albert bought 2 pounds of catfish and 2 pounds of salmon

Let c represent the amount of catfish in pounds and s represent the amount of salmon in pounds.

He spent a total of $12 on salmon and catfish and bought a total of 4 pounds.  Hence:

c + s = 4    (1)

4c + 2s = 12    (2)

Solving equations 1 and 2 simultaneously gives:

c = 2, s = 2

Albert bought 2 pounds of catfish and 2 pounds of salmon

Find out more on equation at: brainly.com/question/2972832

7 0
2 years ago
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