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2 years ago

What is the value of the function y= 3x – 1 when x= -1 ? -8 -4 02 6

Mathematics

1 answer:

netineya [11]2 years ago

7 0

Answer:

-4

Step-by-step explanation:

3(-1)-1 PEMDAS

-3-1=-4

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Please help I'm almost done the test and need this and one other question

PolarNik [594]

Answer:

$z=68$

Step-by-step explanation:

Use the formula $180\times(n-2)$ to find the sum of the angles in a polygon, given <em>n</em> sides. This formula tells us the angles of this pentagon must add to 540 ( $180\times(5-2)=540$ ).

So, we can setup an equation:

$70+2z+11+119+z+2z=540$

Solve for z:

$200+5z=540$ Combine like terms

$5z=340$ Subtract 200

$z=68$ Divide by 5

Therefore, the value of z = 68.

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3 years ago

Find the intersection point between the lines of equations:<br><br>2x-y+6=0 and 2x+3y-6=0

Ugo [173]

Step-by-step explanation:

The two equation will intersect each other at the point which will be the solution of the given two equations , and the given equations are ,

$\implies 2x -y +6=0\\\\\implies 2x + 3y -6=0$

On subtracting the given equations we have,

$\implies -y - 3y +6 -(-6) = 0 \\\\\implies -4y = -12 \\\\\implies y = -12/-4\\\\\implies y = 3$

Put this value in any equation , we have ,

$\implies 2x -3 +6 =0\\\\\implies 2x = -3 \\\\\implies x =\dfrac{-3}{2} \\\\\implies x =-1.5$

Hence the lines will Intersect at ,

$\implies\underline{\underline{ Point=(-1.5, 3)}}$

8 0

2 years ago

Read 2 more answers

You are having a wedding anniversary party. In attendance are a grandfather, a grandmother, two fathers, two mothers, four child

Zepler [3.9K]

After counting, there are 23 people in attendance. If each person is eating two burgers:

$23*2=46$

You'll need at least 46 burgers.

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2 years ago

A survey asked 100 students whether or not they like two sports: soccer and tennis. The results of the survey are shown in the t

wlad13 [49]

Answer:

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2 years ago

The table below shows some inputs and outputs of the invertible function f etc

Snowcat [4.5K]

Answer:

$(a)\ f^{-1}(-15) = -6$

$(b)\ f^{-1}(4) + f(9)=0$

Step-by-step explanation:

Given

The attached table

$(a)\ f^{-1}(-15)$

This represents an inverse function.

So, we look into x row for its value.

i.e.

$f^{-1}(-15) = -6$

$(b)\ f^{-1}(4) + f(9)$

Just like (a)

$f^{-1}(4) = -11$ ---- by looking into the x rows

$f(9) = 11$

So:

$f^{-1}(4) + f(9)=-11 + 11$

$f^{-1}(4) + f(9)=0$

4 0

2 years ago