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3 years ago

HELP PLS SHOW WORK ITS 2 PARTS

Mathematics

2 answers:

sdas [7]3 years ago

7 0

Answer:

a=4.2

Step-by-step explanation:

6.4-a=2.2

so 6.4-22=a

4.2=a

jok3333 [9.3K]3 years ago

6 0

Answer:

Step-by-step explanation:

6.4 - 2.2 = 4.2

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Evaluate the discriminant of -3x2+5-4=0

krok68 [10]

Answer:

-23

Step-by-step explanation:

A quadratic equation is given to us and we are interested in finding the discriminant of the quadratic equation . As we know that ,

If the quadratic equation is in Standard form ,

$\sf\longrightarrow ax^2+bx + c = 0$

The discriminant is ,

$\sf\longrightarrow D = b^2-4ac$

The given quadratic equation is ,

$\sf\longrightarrow -3x^2 +5x - 4 = 0$

On comparing it with the Standard form , we have ,

a = (-3)
b = 5
c = (-4)

So that ,

$\sf\longrightarrow D = (5)^2 - 4(-3)(-4)\\$

$\sf\longrightarrow D = 25 - 48\\$

$\sf\longrightarrow \bf D = -23$

Also note that if D < 0 , then the roots are complex conjugates .

<h3>Hence the discriminant is (-23).</h3>

5 0

2 years ago

How do i plot a compound inequality on a number line?

OlgaM077 [116]

Answer:

To plot an inequality, such as x>3, on a number line, first draw a circle over the number (e.g., 3). Then if the sign includes equal to (≥ or ≤), fill in the circle. If the sign does not include equal to (> or <), leave the circle unfilled in.

Step-by-step explanation:

8 0

3 years ago

A rectangle has a width that is 5 feet less than the length. The area of the rectangle is 126 square feet. Find the dimensions o

mr_godi [17]

Given:

A rectangle has a width that is 5 feet less than the length. The area of the rectangle is 126 square feet

$\\$

❍Let's assume, Length of rectangle x feet and width of the rectangle x - 5 feet respectively.

$\\$

To calculate the dimensions of the rectangle we will use the formula of Area of rectangle:

$\\$

$\: \: \: \: \: \: \: { \underline{ \boxed{ \pmb{ \frak{ Area_{(rectangle)} = Length \times width }}}}} \\ \\$

$\\$

$\underline {\sf{Substituting \: the \: values~ in~ above~formula: }} \\$

$\\$

$: \implies \sf \:x \times (x - 5) = 126 \\ \\ \\ : \implies \sf \:x^2 - 5x = 126 \\ \\ \\ : \implies \sf \:x^2 - 5x - 126 = 0 \\ \\ \\ : \implies \sf \:x^2 - 14x - 9x - 126 = 0 \\ \\ \\ : \implies \sf \:x (x - 14) - 9 (x + 14) = 0 \\ \\ \\ : \implies \sf \:(x - 14)(x - 9) = 0 \\ \\ \\ : \implies { \boxed { \purple{\pmb { \: x = 14 \: \: or \: \: x = -9}}} } \\ \\ \\$

We know that side can't be negative. So, x = 14 feet

Hence,

Width of rectangle = x - 5 = 9 feet
Length of rectangle = x = 14 feet

$\\$

$\\ { \underline{ \pmb{ \frak{\therefore Dimensions \: of \: rectangle \: are \: 9~ feet \: and \: 14 ~feet \: }}}}$

3 0

3 years ago

Read 2 more answers

How is solving literal equations different from solving 2 step equations

Debora [2.8K]

Answer:

Hola!

She did not really want that particular job.

Hola!

She did not really want that particular job.

She had been lookHola!

She did not really want that particular job.

She had been looking for a long time when she got the offer

These two sentences will be joined by 'although'

Although she did not really want that particular job, she had been looking for it for a long time when she got the offer.

So according to your options option (A) is correct.

______________________________________________________

Hope this helps u...☺

ing for a long time when she got the offer

These two sentences will be joined by 'although'

Although she did not really want that particular job, she had been looking for it for a long time when she got the offer.

So according to your options option (A) is correct.

______________________________________________________

Hope this helps u...☺

She had been looking for a long time when she got the offer

These two sentences will be joined by 'although'

Although she did not really want that particular job, she had been looking for it for a long time when she got the offer.

So according to your options option (A) is correct.

______________________________________________________

Hope this helps u...☺

Step-by-step explanation:

8 0

3 years ago

Which of the following is equal to the rational expression when x doesn’t equal 1 or 3? HURRY PLEASE

Finger [1]

your answer is aaaaaaaaaa

7 0

3 years ago

Read 2 more answers