Mathematics High School

Show that 4x - x? – 7 is always
negative.




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Show That 4x - X? 7 Is Alwaysnegative.Help

Answers

Answer 1

                                          Question No 7

Answer:

Please check the explanation.

Step-by-step explanation:

Show that 4x - x² - 7 is always negative.

Given

4x - x² - 7

4x - x² - 7 is always negative because:

-x²-7 will alwas be negative for all the values of x, The value of  - x² - 7 will always be less than 4x for all the values of x

Hence, 4x - x² - 7 is always negative

For example,

let suppose we enter x = 1

[tex]4(1)-1^{2} -7\\=4-1-7\\=4-8\\=-4[/tex]

let suppose we enter x = -1

[tex]4(-1)-(-1)^{2} - 7\\= -4 - 1 - 7\\= -12[/tex]

Related Questions

anyone know this, its rlly hard​

Answers

Answer:

......................................................................................................

Step-by-step explanation:

order the following from least to greatest 12. 55% 0.67 1.24 100%​

Answers

Answer:

0.67, 1.24, 12, 55, 100

Step-by-step explanation:

Solve using a proportion and an equation. Kendra found the experimental probability of her making a penalty kick in soccer is 3/10 or 30%. Out of 40 penalty kicks, how many could she predict she will make?

Answers

Answer: The predicted number of penalty kicks = 12

Step-by-step explanation:

Given : The experimental probability of her making a penalty kick in soccer is 3/10 or 30%.

So, the proportion of penalty kicks she make = 0.3

Out of 40 penalty kicks, the predicted number of penalty kicks = 0.3 x 40

= 12

Hence, the predicted number of penalty kicks = 12

Matthew drives at an average speed of 62 mph for 5 hours
B) how many miles does Matthew drive

Answers

Matthew drives 310 miles

Answer:

310

Step-by-step explanation:

62 multiplied by 5 will get you the answer

Hurry!! pls answer!! Rewrite this exponential equation as a logarithmic equation.
4e1
=
16

Answers

It should be log_e(4)=x
Hello friend I am sending this answer

(2y^3-5y^2-4)-(4y^3+11y^2-3y+5)

Answers

-2y^3-16y^2+3y-9 is the answer

What is 6.5% of 150 dollars? a tip on percentage of numbers would also be appreciated, thank you :)​

Answers

6.5% of $150 is $9.75

4(2a + 2) = 8(2 - 3a) whats A? please help me!!!!

Answers

Answer:

a = [tex]\frac{3}{8}[/tex]

Step-by-step explanation:

4(2a + 2) = 8(2 - 3a)

Distribute.

8a + 4 = 16 - 24a

Add 24a to each side.

32a + 4 = 16

Subtract 4 from each side.

32a = 12

Divide 32 from each side.

a = [tex]\frac{3}{8}[/tex]

Martin has 13 liters of soda.
Each glass can hold of a liter
of soda. How many glasses can
Martin completely fill with soda?

Answers

the answer is 13 glasses

Answer:

13

Step-by-step explanation: If each glass can hold 1 liter than 13 glasses can hold 13 liters.

Help please thanks pic attached

Answers

It would be 4 , 8, 6

Hope this helps

Have a great day/night
answer: 4, 8, 6


hope this helps too :))

2.00llons is
equal to how
many liters

Answers

2 us liquid gallons =
7.571 liters

Hey, I don't want to bother anyone but could someone help me fill in the angle of x?

Answers

Answer:

x = 90°

Step-by-step explanation:

diagonal line = 180 = x + 90

180 - 90 = x

90 = x

therefore, x = 90°

uhm please help me
I’m not really good at Math as you can tell :(

Also: Don’t mind the tabs (^^;)

Answers

Answer:

5 37.50

10 75

hope it helps

Step-by-step explanation:

prove me wrong

Answer:

Lol the you tube tab though XD

Step-by-step explanation:

What is the function that is represented by the graph shown:

Answers

Answer:

I believe its the second one

PIZZZ HURRY IM IN A RUSH .-.!!!Two sets are shown in the Venn diagram. Set N represents the natural numbers, and Set W represents the whole
numbers. in which set does the values -45 belong?

Answers

Answer:

In my opinion this is the whole w

Step-by-step explanation:

plzzzzzzzzzzzzzzzzzzzzzzzzzzz

Answers

6x^2 + 8x - 9x - 12
= 6x^2 - x - 12

6    Answer:

2

−

−

1

2

Step-by-step explanation:

Find the measure of angle A

Answers

Answer:

it is 60 of right angle

Step-by-step explanation:

there

4x+5+13x+90=180
17x+95=180
17x=85
x=5

help me translate this into an expression!

" Four times the quotient of twice a number and eight "

thank you!

Answers

Answer:

[tex]4(\frac{2x}{8})[/tex]

Step-by-step explanation:

There you go! :)

I WILL GIVE YOU BRAINLY PLSS


Evaluate m( m + n) – n, use m = 5 and n = -3
A. 7
B. 13
C. 43
D. 37

PLSS SHOW YOUR WORK PLSS

Answers

Answer:

B. 13

Step-by-step explanation:

[tex]m(m + n) - n[/tex]

[tex]m = 5 \\ n = - 3[/tex]

Substitute m = 5 and n = - 3 in the expression.

[tex]5(5 + ( - 3)) - ( - 3) \\ 5(5 - 3) + 3 \\ 5(2) + 3 \\ 10 + 3 \\ 13[/tex]

Remind that negative multiply negative must equal positive.

The answer is 13 ! :) 5(5+(-3))-(3-)= X
Distribute 5
25+(-15)-(-3)
The minus (-3) turns into a positive so you get +3 and you add it all together and get 13 :)

Can someone help me ?!

Answers

Answer:

y<-2x-3

Step-by-step explanation:

Your first step is to find the equation of the line. You can see that the y-intercept is -3, therefore your b is -3. So now your formula looks like this:

y=mx-3

To find m, you substitute in an x value and its corresponding y value. When you do this you will get -2.

Now it looks like this:

y=-2x-3.

Now that you have the equation of the line, you can look at the inequality. Since the line is dotted, that means it is not included in the inequality. That mean it cannot contain an equal to. So the only options we have are < and >. Since the shaded area is to the left, which is the negative side, we can conclude that y<-2x-3 is the correct equation.

HOPE THAT THIS IS HELPFUL!

The Invisible Hand promotes
A. marketplace inflation
B. marketplace competition
C. marketplace monopolies
D. marketplace shortages​

Answers

The answer to this is D

please help me on this!

Answers

Answer:

9*572=5148

Step-by-step explanation:

Helppppp meeeee pleaseee

Answers

Letter “ E ” and letter “ F ” are the answers
Well, the answer to this question is B and F.
Also, I just want to say happy new year to you and have a fantastic rest of your day!
Also, can you please mark my answer as the brainliest answer?
Thank you!

ill give you brainliest if you answer fast and correctly

Answers

Answer:

the answer is 64.29% or just 64

the fraction form is 2/3

Step-by-step explanation:

Answer:

2/3 (Two-Thirds)

The percentage is also 66.6666667%, if they are asking for that.

Step-by-step explanation:

First, you add up all the numbers and get 84.

Then, you add up Friday and Saturday, to get 56.

You now have 56/84.

Simplify and get 2/3.

You are LOVED <3

You roll a dice twice.
Find the probability of getting 3 in first throw and 5 in second throw.

Answers

Answer:

1/6

Step-by-step explanation:

there are 6 faces on a dice so there's a 1 in 6 chance that you would roll a 3 on your second go there is still only a 1 out of 6 chance of getting a 5 because there is still 6 numbers you could roll on.

hope this helped

A person invests 3000 dollars in a bank. The bank pays 4.25% interest compounded semi-annually. To the nearest tenth of a year, how long must the person leave the money in the bank until it reaches 5600 dollars?

Answers

Answer:

The person must leave the money for approximately 14.8 years.

Step-by-step explanation:

This can be calculated using the formula for calculating the future value as follows:

FV = PV * (1 + r)^n …………………………………. (1)

Where;

FV = Future value of the investment = 5600

PV = Present value of the investment = 3000

r = semiannual interest rate = 4.25% / 2 = 0.0425 / 2 = 0.02125

n = number of semiannuals = ?

Substitute the values into equation (1) and solve for n, we have:

5600 = 3000 * (1 + 0.02125)^n

5600 / 3000 = 1.02125^n

1.02125^n = 1.86666666666667

Loglinearizing both sides, we have:

nlog1.02125 = log1.86666666666667

n = log1.86666666666667 / log1.02125

n = 0.271066772286539 / 0.0091320695404719

n = 29.6829509548973

Since n is number of semiannuals, we divide the answer by 2 obtain the number of years as follows:

Number of years = 29.6829509548973 / 2 = 14.8414754774487

Rounding to the nearest tenth of year, we have:

Number of years = 14.8

Therefore, the person must leave the money for approximately 14.8 years.

Explain the best you can because I’m struggling :)

Answers

Step-by-step explanation:

A. 3x+4/2 = 9.5

3x + 4/2 = 9.5........criss cross

3x+4= 9.5×2

3x = 19-4

3x = 15

x=5 ..........divide both sides by 3

B. 7+ 2x/3= 5.......criss cross

7+2x = 5 × 3

7 + 2x = 15

2x = 15-7

2x = 8......divide both sides by 2

x = 4

Mrs.Walker would like to give each of her 32 students no less than three stickers. How many stickers must she have
​

Answers

Answer:

Mrs. Walker will need at least 96 stickers in order to give each of her students at least 3 stickers each.

Step-by-step explanation:

32*3=96.

96 is the minimum

Simplify the expression. Write your answer using an improper fraction
with no spaces.

Answers

Answer: 59/3k+14

Step-by-step explanation:

8-2x=-3+1 solve the question

Answers

8+2= 2x
10=2x
X=10/2
X=5
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