2 years ago

To solve this system of equations using substitution, what could be substituted in place of y in the first equation?

1 answer:

6 0

Looking at second equation.. you must put it in y=Mx+b form and so you must add 2x from both side leaving you with 7 +2x or in this case 2x+7

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Find the value of x.

dimaraw [331]

Answer:

$2\sqrt{77}$

Step-by-step explanation:

Use the Pythagorean theorem. $a^{2} +b^{2}=c^{2}$

a and b are the two side lengths

c is the hypotenuse (value across from the right angle)

Plug in the values that you are given.

$a^{2} +4^{2} =18^{2}$

Solve for x

$x^{2} =18^{2} -4^{2}$

$x^{2} =308$

x= $\sqrt{308}$

$x=2\sqrt{77}$

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2 years ago

Write an equation for the line below.

Dmitry_Shevchenko [17]

Answer:

x = 3

Step-by-step explanation:

A vertical line has the form x = constant. The graph shows the constant you want is 3.

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2 years ago

Liz is shipping a package to her friend. The maximum weight of a medium flat-rate box is 20 pounds, including the box which weig

Goryan [66]

W= less than or equal to 19.63 pounds

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3 years ago

Kim owes her friend $245 and plans to pay $35 per week. write an equation for the function that shows the amount Kim owes after

nevsk [136]

35x=245

so you would divide both sides by 35

x=7

so it would take her 7 weeks or 1 month and 3 weeks to pay her friend back

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3 years ago

Which of these numbers had exactly tow factors?

zvonat [6]

Answer:

prime numbers only have two factors...

7 is the only prime in the list

Step-by-step explanation:

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2 years ago