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2 years ago

6

Carlos is mailing packages. Each small package costs him $2.40 to send. Each large package costs him $2.90. How much will it cos

t him to send 1 small package and 3 large packages?

2 answers:

aalyn [17]2 years ago

8 0

Answer:

$11.10

Step-by-step explanation:

1 small package = $2.40

1 large package = $2.90

1 small package + 3 large packages.

2.40 + (3 × 2.90)

=2.40 + 8.70

=11.1

Vlad [161]2 years ago

3 0

Answer:

$11.10

Step-by-step explanation:

This problem can be modeled by 2.4x+2.9y=c

x=small packages

y=large packages

c=total cost

By plugging in the values you get 2.4(1)+2.9(3)=c

2.4+8.7=c

c=11.1

Therefore the total cost is $11.10

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eduard

First Let we solve the Original system of equations:

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equation (2): $7x-8y=6$

Multiplying equation (1) by 7, we get

$7x+21y=35 -->(3)$

$7x-8y=6 --> (2)$

Subtracting,

$29y=29$ implies $y=1$

Then $x=5-3(1)=2$

Thus the solution of the original equation is $x=2, y=1.$

Now Let we form the new equation:

Equation 2 is kept unchanged:

Equation (2): $7x-8y=6$

Equation 1 is replaced with the sum of equation 1 and a multiple of equation 2:

Equation (1): $8x-5y=11$

Now solve this two equations: $8x-5y=11, \\ 7x-8y=6$

Multiply (1) by 7 and (2) by 8,

$56x-35y=77$

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Subtracting, $29y=29$ implies $y=1$

Then x=2.

so the solution for the new system of equation is x=2, y=1.

This Show that the solution to the system of equations 8x − 5y = 11 and 7x − 8y = 6 is the same as the solution to the given system of equations

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2 years ago

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:= Question Help

artcher [175]

Answer: OC

Step-by-step explanation: exact answer is 64.6

7 0

2 years ago

S = ut+ 16t²<br>Find the value of s when u = 2 and t = 3.

Fed [463]

Answer:

<h2>150</h2>

Step-by-step explanation:

Given,

u = 2

t = 3

Now, Finding the value of s

$s = ut \: + 16 {t}^{2}$

Plugging the values of u and t

$s = 2 \times 3 + 16 \times {( 3)}^{2}$

Calculate

$s = 2 \times 3 + 16 \times 9$

$s = 6 + 144$

Calculate the sum

$s = 150$

Hope this helps ..

Good luck on your assignment..

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2 years ago

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PLEASE HELP!!!!!!!!!!!!!!!!!!!!!

Anuta_ua [19.1K]

Answer:

i dont know

Step-by-step explanation:

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2 years ago

What two numbers add up to 6 and multiply to 12?

GuDViN [60]

Erm

x+y=6
xy=12

x+y=6
y=6-x
sub back

xy=12
x(6-x)=12
6x-x^2=12
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quadratic formula
for
ax²+bx+c=0
$x= \frac{-b+/- \sqrt{b^2-4ac} }{2a}$

for
x²-6x+12=0
a=1
b=-6
c=12
and remember that √-1=i

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$x= \frac{6+/- 2i\sqrt{3} }{2}$
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no real numbers tho

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3 years ago