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Sati [7]
3 years ago
11

4x+5y=13,3x+2y=8 in substitution method​

Mathematics
2 answers:
Rus_ich [418]3 years ago
7 0
X= 5.20625 Y= -2.565
dybincka [34]3 years ago
5 0

answer: x= 2,y=1

hope i helped you :0

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How many tens are there in 850​
marishachu [46]

Answer:

85

Step-by-step explanation:

This is the same as asking:

What is 850 divided by 10?

When you divide it by 10 it's telling you how many times 10 can go into 850.

So, 850 / 10 = 85

4 0
3 years ago
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The sum of 42 fish and x fish is 68 fish. What is the unknown number of fish?
lozanna [386]

Answer:

the unknown number of fish is 26

Step-by-step explanation:

I figured this out by subtracting 68 - 47 = x.

x = 26

7 0
3 years ago
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The fish population of Lake Collins is decreasing at a rate of 5% per year. In 2004 there were about 1,350 fish. Write an expone
ad-work [718]

Answer:

Part 1) The exponential function is equal to y=1,350(0.95)^{x}

Part 2) The population in 2010 was  992\ fish

Step-by-step explanation:

Part 1) Write an exponential decay function that models this situation

we know that

In this problem we have a exponential function of the form

y=a(b)^{x}

where

y ----> the fish population of Lake Collins since 2004

x ----> the time in years

a is the initial value

b is the base

we have

a=1,350\ fish

b=(100\%-5\%)=95\%=0.95

substitute

y=1,350(0.95)^{x} ----> exponential function that represent this scenario

Part 2) Find the population in 2010

we have

y=1,350(0.95)^{x}

so

For x=(2010-2004)=6\ years

substitute

y=1,350(0.95)^{6}=992\ fish

7 0
3 years ago
Which two of the following have the same value as 50.96?<br> Choose 2 answers:
Firdavs [7]

Answer:

A and C

Step-by-step explanation:

A: 5 tens = 50

9 tenths = 0.9

6 hundreths = 0.06

= 50.96

C: 5*10 = 50 + 9 * 1/10 = 0.9 + 6 * 1/100 = 50.96

8 0
3 years ago
Find the value of x. Round to the nearest tenth.<br> Answers<br> A-12.5<br> B-10<br> C-13<br> D-9.7!
kvasek [131]

Answer:   A.  12.5

<u>Step-by-step explanation:</u>

cos\ \theta=\dfrac{adjacent}{hypotenuse}\\\\\\cos\ 28^o=\dfrac{11}{x}\\\\\\\rightarrow\ x=\dfrac{11}{cos\ 28^o}\\\\\\\rightarrow\ x=12.46\\\\\\\rightarrow\ \boxed{x=12.5}\qquad rounded\ to\ the\ nearest\ tenth

6 0
3 years ago
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