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3 years ago

Which equations has -6minus as a possible value of a?

Mathematics

1 answer:

ch4aika [34]3 years ago

4 0

Answer:

Perimetrul triunghiului ABC este egam cu 36 cm, iar AB = 15 cm si AC = 13 cm. Lungimea segmentului BC = cu...

Step-by-step explanation:

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Which relation is a function?

DiKsa [7]

Think about the definition of a function. what has to be true? leave a message if you need more help.

7 0

3 years ago

A 2-gallon bucket of paint costs $58.00. What is the price per quart? $

tia_tia [17]

Answer:

7 dollars and 25 cents

Step-by-step explanation:

there is 8 quarts in 2 gallons then divide 58 dollars by 8 and you get 7 dollars 25 cents

5 0

3 years ago

What is the quotient of (6x4 + 15x3 – 2x2 + 10x – 4) ÷ (3x2 + 2) ?

Vika [28.1K]

We are given with the expression above such that the required in the problem is the quotient of the two polynomials. We just have to try each of the polynomials given as option to 3x2 + 2 to give the equation in the numerator. The answer is B.) 2x^2 – 5x – 2

4 0

3 years ago

Galena is solving the following system. 3x+2y+3z =5 7x+y +7z=-1 4x-4y-z=-3

babymother [125]

Answer:

She did not multiply equation 3 in step 2 by the correct value.

Step-by-step explanation:

Given:

$3x+2y+3z=5\\7x+y+7z=-1\\4x-4y-z=-3$

In order to solve this, we need to eliminate any one variable and then form a simultaneous equation with the remaining two variables. Then, we nee to solve the simultaneous equation.

Here, Galena is trying to eliminate the variable $z$ first.

Step 1: She multiplies equation (3) by 3 and adds it to equation (1)

Let us multiply equation (3) by 3

$(4x-4y-z=-3)\times 3 = (3\times 4x)-(3\times 4y)-(3\times z)=3\times -3\\(4x-4y-z=-3)\times 3 =12x-12y-3z=-9$

Now, adding this to equation 1 will cancel out z terms.

$12x-12y-3z+3x+2y+3z=-9+5\\(12x+3x)+(-12y+2y)+(3z-3z)=-4\\15x-10y+0=-4$

Now, she need to make one more equation in $x\ and \ y$ .

Step 2: She multiplies equation (3) by -7 and adds it to equation (2)

Multiplying equation (3) by -7 will give,

$(4x-4y-z=-3)\times -7 = (-7\times 4x)-(-7\times 4y)-(-7\times z)=-7\times -3\\(4x-4y-z=-3)\times 3 =-28x+28y+7z=21$

Now, adding this to equation 2 will not cancel out z terms.

$-28x+28y+7z+7x+y+7z=21-1\\(-28x+7x)+(28y+y)+(7z+7z)=20\\-21x+29y+14z=20$

So, she makes mistake in step 2 as the $z$ terms are not being cancelled.

6 0

3 years ago

Read 2 more answers

Four rays meet at a common endpoint. In a complete sentence, describe the relevant angle relationships in the diagram. Set up an

horrorfan [7]

Answer:

x=14

Step-by-step explanation:

Adding all angles in this diagram sould get you 360. Because of this, we can use inverse operations to solve this. Subtract 90 and 60 from 360 to get 210. Now, the equation is 15x=210. Dividing both sides by 15 gets you 14. Hope this helps!

8 0

3 years ago