All categories

2 years ago

What's is slope of 2y+8x=21

2 answers:

4 0

2y+8x=21
This is in standard form, lets convert to slope intercept form

slope intercept form : y = mx + b

2y + 8x = 21
-8x -8x

2y = -8x + 21
y = -4x + 21/2

Answer: m = -4

Alika [10]2 years ago

3 0

8x + 2y = 21
8x - 8x + 2y = -8x + 21
2y = -8x + 21
2 2
y = -4x + 10.5

Slope: -4

You might be interested in

If a person studies for 8hrs a week. How long to they work each day

Andrew [12]

Answer:

about and hour and 14 minutes each day

Step-by-step explanation:

just divide 8 by 7 and round to the nearest hundredths place

7 0

2 years ago

Which of the following is an equivalent equation obtained by completing the square of the expression below? x^2+6x−8=0 A (x+3)^2

valentina_108 [34]

Answer:

Solving the equation $x^2+6x-8=0$ by completing the square method we get $\mathbf{(x+3)^2=17}$

Option B is correct option.

Step-by-step explanation:

We need to solve the equation $x^2+6x-8=0$ by completing the square method.

For completing the square method: we need to follow: $a^2+2ab+b^2=(a+b)^2$

We are given:

$x^2+6x-8=0$

Solving by completing the square

$x^2+2(x)(?)+(?)^2-8=0$

We need to find ? in our case ? is 3 because 2*3= 6 and our middle term is 6x i,e 2(x)(3)=6x.

So, adding and subtracting (3)^2

$x^2+2(x)(3)+(3)^2-8-(3)^2=0\\(x+3)^2-8-9=0\\(x+3)^2-17=0\\(x+3)^2=17$

So, solving the equation $x^2+6x-8=0$ by completing the square method we get $\mathbf{(x+3)^2=17}$

Option B is correct option.

7 0

2 years ago

Please answer!!! Will mark brainliest answer !!!

kenny6666 [7]

Answer:

A, D

Step-by-step explanation:

When we multiply the fractions, we can get:

$\frac{1}{5^{4} }$

This is also equivalent to:

$5^{-4}$

When looking at the answer choices, the only ones that equal $5^{-4}$ are A and D because:

$(5^{-2})^{2} =5^{-4}$

$5^{2}*5^{-6} = 5^{-4}$

3 0

2 years ago

Please take a look at the question. Please explain and type your explaination. Please make it quick as possible. Thankyou!

Firlakuza [10]

Answer:

Yes, it's true

Step-by-step explanation:

A fraction is a part of a whole number for example 1/2. 1/2 is a half of one whole piece and if you multiply it into any whole number whether it's 2,4,6,8,10...... basically, if you multiply a fraction less than one with a non-zero whole number, it will always be less than the whole number it's being cut into smaller pieces. However, if the fraction is greater than 1, we would technically have an answer greater than the whole number product, just something to remember.

5 0

2 years ago

Plzzzzz help i'm in desprate need of help with this

Ainat [17]

Answer:

Obtuse

Step-by-step explanation:

Right = has angle measure of 90°

Acute = has angle measure less than 90°

Equilateral = 2 or more angles whose angle measures are congruent to others

Circle = measures 360°

<u>Obtuse = Angle measure greater than 90° and less than 180°</u>

Hope this helps!

5 0

2 years ago