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3 years ago

Please help me

1 answer:

7 0

Just multiply 9 to the temperature in Cleveland.

$\sf9\times-2=-18$

So the temperature in International Falls is -18°F.

It's not 18, because 18 is warmer than -2, not colder and the question says that International Falls is 9 times colder than Cleveland.

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X— 3y+z= 6 2x — бу – 2 = -2 —x+y+ 2 = 7

dlinn [17]

Answer:

x = -7 1/2

y = - 5/2

z = 11

Step-by-step explanation:

x— 3y+z= 6 (1)

2x — бу – 2 = -2 (2) <=> 2x - 6y = -2 + 2 = 0 <=> (2x - 6y)/2 = 0 <=> x - 3y = 0 (4)

—x+y+ 2 = 7 (3) <=> -x + y = 7 - 2 <=> x - y = -5 (5)

Subtract (5) from (4), we have:

(x - 3y) - (x - y ) = 0 - (-5)

<=> x - 3y - x + y = 5

<=> -2y = 5

<=> y = - 5/2

Replace y with (4), we have x = 3 × (-5/2) = -15/2 (or -7 1/2)

Replace x with -15/2 and y with -5/2 in (1), we have z = 6 - (-15/2 - (-5/2)) = 6 + (15/2 - 5/2) = 6 + 5 = 11

4 0

3 years ago

Read 2 more answers

Identify the first five terms of the sequence in which a1 = 5 and an = 2an−1−3 for n ≥ 2.

ziro4ka [17]

Answer:

5, 7, 11, 19, 35

Step-by-step explanation:

Using the recursive formula and a₁ = 5 , then

a₂ = 2a₁ - 3 = (2 × 5) - 3 = 10 - 3 = 7

a₃ = 2a₂ - 3 = (2 × 7) - 3 = 14 - 3 = 11

a₄ = 2a₃ - 3 = (2 × 11) - 3 = 22 - 3 = 19

a₅ = 2a₄ - 3 = (2 × 19) - 3 = 38 - 3 = 35

Thus the first 5 terms are

5, 7, 11, 19, 35

3 0

3 years ago

If f(x) = x^2 - 4x + 3, and the domain is {-2, 0, 1}, what is the range?

dangina [55]

Evaluate the function at the three values of the range and see what you get. The appropriate choice is ...

... D) {15, 3, 0}

_____

Evaluation can sometimes be simpler if you rearrange the function to a form called "Horner's form."

... f(x) = (x -4)x +3

Then the evaluation looks like (for x=-2) ...

... f(-2) = (-2-4)(-2)+3 = (-6)(-2) +3 = 12 +3 = 15

This is sufficient to identify D as the answer of choice.

5 0

3 years ago

Rate of change for 71, 62,53,44

Vladimir79 [104]

Answer:-9

Step-by-step explanation:

71-62=9

62-53=9

53-44=9

It is negative because the numbers are decreasing

3 0

3 years ago

The graph of a linear function intersects with the x axis at a point with an abscissa of 4 and with the y axis at a point with a

Leni [432]

We know that

points are
x intercept
A (4,0)

y intercept
B (0,11)

step 1
find the equation of a line
m=(y2-y1)/(x2-x1)--------> m=(11-0)/(0-4)------> m=-11/4

with m and the point B (0,11)
y-y1=m*(x-x1)
y-11=(-11/4)*(x-0)---------> y=-(11/4)x+11

the answer is
the formula of the function is
y=-(11/4)x+11

see the attached figure

3 0

3 years ago