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Morgarella [4.7K]

4 years ago

6

The answer using substitution method

1 answer:

Lera25 [3.4K]4 years ago

5 0

Ok so the equations are
4(x-2)=19-5y
3(x-2)-2y=-y
So just solve for one variable on one equation
4x-8=19-5y
Which will get you y=-4x/5 +27/5
Then just substitute x in on the other equation, so
3(x-2) - 2 (-4x/5+27/5) = 4x/5 - 27/5
And then just solve, so you would get
x=3, and plug this into another equation, and get also y=3.

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To control his weight, Joel reduced his calorie intake from 2500 calories to 1950 calories each day. What was his percent of dec

garik1379 [7]

Answer:

22% decrease. Joel is consuming 78% of the amount of calories he previously consumed.

Step-by-step explanation:

1950 = 2500x

x = 1950 / 2500

x = 0.78

1 - 0.78 = 0.22

5 0

3 years ago

Read 2 more answers

Resultado de la operación -2-(5-3)+4

murzikaleks [220]

Answer:

0

Step-by-step explanation:

-2-(5-3)+4

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2 years ago

Tyrone has $500 in his savings account. He wants to save more money. He is looking at two investment plans. Under plan A, he wil

Marrrta [24]

Answer:

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Step-by-step explanation:

Let

x ---> the number of years

y ---> the amount in the account balance

Plan A

we have a linear equation of the form

$y=mx+b$

where

The slope is equal to

$m=\$100\ per\ year$

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$b=\$500$

substitute

$y=100x+500$

For x=10 years

substitute

$y=100(10)+500=\$1,500$

Plan B

we have a exponential growth function of the form

$y=a(1+r)^x$

where

$a=\$500\\r=15\%=15/100=0.15$

substitute

$y=500(1+0.15)^x$

$y=500(1.15)^x$

For x=10 years

substitute

$y=500(1.15)^{10}=\$2,022.78$

Find the difference of the two account balances after 10 years

$\$2,022.78-\$1,500=\$522.78$

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3 years ago

You are offered two jobs. One with a yearly salary of $51,670, and the other an hourly

sattari [20]

Step-by-step explanation:

a year = 52 weeks

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= $22

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3 years ago

A polar bear swims 390 meters at a constant rate in 150 seconds. what is the speed of the polar bear?

worty [1.4K]

The answer is 2.6 m/s

The speed (v) is distance (d) through time (t).
v = d/t

We know:
d = 390 m
t = 150 s

v = d/t
v = 390 m / 150s
v = = 2.6 m/s

5 0

4 years ago