I need help pls pls plsplspslelslelslsl

Answer:

x=−1/2+1/2√10  or -1/2+-1/2√10

Step-by-step explanation:

4x2+4x−2=7

Step 1: Subtract 7 from both sides.

4x2+4x−2−7=7−7

4x2+4x−9=0

For this equation: a=4, b=4, c=-9

4x2+4x+−9=0

Step 2: Use quadratic formula with a=4, b=4, c=-9.

x=

−b±√b2−4ac

2a

x=

−(4)±√(4)2−4(4)(−9)

2(4)

x=

−4±√160

8

x=

−1/2

+

1/2

Answer:

There is needed around 311 balloons to fulfill Mr. Schordine’s dream of flight.

Step-by-step explanation:

First, we need to calculate the volume of each balloon by considering the balloons as a sphere:    

[tex] V = \frac{4}{3}\pi r^{3} [/tex]

Where:

r: is the radius = 0.4 meters

[tex] V = \frac{4}{3}\pi r^{3} = \frac{4}{3}\pi (0.4 m)^{3} = 0.27 m^{3} [/tex]

Knowing that 1 m³ of helium is able to lift about 1 kg, that Mr. Schordine weights 84 kg, and that each ballon has 0.27 m³ of helium, the number of balloons needed are:

[tex] N = \frac{1 m^{3}}{1 kg}*84 kg*\frac{1 balloon}{0.27 m^{3}} = 311.1 \: balloon [/tex]              

Therefore, there is needed around 311 balloons to fulfill Mr. Schordine’s dream of flight.      

I hope it helps you!

Answer:

D since I had a test question of this and got it right.

Step-by-step explanation:

Option D is correct, credit cards can help you stay within budget since you can't spend more than what's in your linked bank account.

A credit card is a payment card issued to users to enable the cardholder to pay a merchant for goods and services based on the cardholder's accrued debt.

Credit cards can help you stay within budget since you can't spend more than what's in your linked bank account is not accurate because credit cards actually allow users to spend more than what's in their linked bank account, which can lead to overspending and accumulating debt.

Unlike debit cards, which are linked directly to a checking account, credit cards allow users to borrow money from a lender up to a certain credit limit.

This means that users can potentially spend more than they have available in their bank account and then pay off the balance over time with interest.

Hence, Option D is correct, credit cards can help you stay within budget since you can't spend more than what's in your linked bank account.

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https://brainly.com/question/30940802

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Answer:Since a Pythagorean triple is three positive integers a, b, and c such that (a^2)+(b^2)=(c^2), first take the sum of the squares of the two legs and make an estimate. For example, 3, 4, and 5 is a Pythagorean triple since 9+16=25.

Step-by-step explanation:

Answer: easy it’s..........

Step-by-step explanation: 26+M

Answer:

Sample Space

Step-by-step explanation:

A set of all possible outcomes of an experiment is called a sample space. Sample space is simply the set of all possible sample points of a given experiment.

Hope this helps!

Answer:

Step-by-step explanation:

The answer is $1,360 (please like)

The annual dividend on 2000 shares at the time would be $3200

Quarterly dividend for 2000 shares :

Annual dividend on 2000 shares :

Therefore, the Annual dividend will be $3200

Learn more : https://brainly.com/question/23105648

Answer:

Step-by-step explanation:

the first one, because 4 times 3 is twelve, minus 0 is twelve

unless it means less than, then it is the last one

Answer:

4:10 PM

Step-by-step explanation:

The time at which the passenger train is 61.5 miles west of Kalamazoo and the freight train is now 49.5 miles east of Kalamazoo  4:10 pm

Speed is the ratio of distance travelled to time taken. It is given by:

Speed = distance / time

Let a represent the speed passenger train and b for the freight train.

The passenger train averages 16 miles per hour faster than the freight train, hence:

a = b + 16   (1)

Also:

a = 61.5/t

t = 61.5/a

b = 49.5/t

t = 49.5/b

61.5/a = 49.5/b

61.5b = 49.5a    (2)

From both equations:

a = 82 mph, b = 66 mph

t = 61.5/82 = 0.75 hour = 45 minutes

Time = 3:25 p.m + 45 minutes = 4:10 pm

The time at which the passenger train is 61.5 miles west of Kalamazoo and the freight train is now 49.5 miles east of Kalamazoo  4:10 pm

Find out more on speed at: https://brainly.com/question/4931057

Answer:

8

Step-by-step explanation:

It be wayyy to much to put 13 it would make the mean 9 8 is perfect

Answer: look at the picture

Step-by-step explanation: Hope this help :D & mark me Brainliest plzz I really need it

Answer: Kohl's

Step-by-step explanation:

Kohl's

30 x 0.20 = 6

30 - 6 = 24

Macy's

30 - 5 = 25

$1.00 difference

Answer:

(x - 5)² + (y - 2)² = 9

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r the radius

Here (h, k ) = (5, 2 ) and r = 3 , then

(x - 5)² + (y - 2)² = 3² , that is

(x - 5)² + (y - 2)² = 9

Answer:

True.

Step-by-step explanation:

Since the degree measure of both angles are the same, that means they're the exact same width. Therefore, both arcs are the same.

Answer:

F. Picture F

Step-by-step explanation:

Answer:

its F

Step-by-step explanation:

Answer:

64

Step-by-step explanation:

bceuse  8 is the radius

Step-by-step explanation:

3 ÷ 5 is 0.6

0.6 is the answer

Answer:

[tex]\frac{3}{5}[/tex] or [tex]0.6[/tex] depending on if they want it as a fraction or a decimal.

Step-by-step explanation:

You would do 3 divided by 5 to get 0.6.

You would just do 3/5 to get the fraction.

Hope I helped

Answer:

-16 =n

Step-by-step explanation:

Let n= number

4n -21 = 6n +11

Subtract 4n from each side

4n-4n -21 = 6n-4n +11

-21 = 2n+11

Subtract 11 from each side

-21-11 = 2n

-32 = 2n

Divide by 2

-32/2 = 2n/2

-16 =n

Answer : -16 =n

Step-by-step explanation:

Let n= number

4n -21 = 6n +11

Subtract 4n from each side

4n-4n -21 = 6n-4n +11

-21 = 2n+11

Subtract 11 from each side

-21-11 = 2n

-32 = 2n

Divide by 2

-32/2 = 2n/2

-16 =n

Answer: 19.26

Step-by-step explanation: 40% of 30 can be found like 30(0.40), which equals 12, since the game is 40% of they are getting $12 off. 30-12=18. The sales tax is 7% or 0.07 so you can find it by doing 18(0.07) which is 1.26, now you just add 1.26 and 18 which is 19.26.

Answer:

2.25 mi

Step-by-step explanation:

Answer:

-2

Step-by-step explanation:

maybe?

Answer:

C ang sagaot sure ako nagaaral ako nyan

Answer:

hi

Step-by-step explanation:

[tex]v = \pi \times {r}^{2} \times h \\ v = 3.14 \times {3}^{2} \times 9 \\ v = 254.34 \: in[/tex]

hope it helps

have a nice day

Given:

The quadratic equation is:

[tex]16x^2-20x-6=0[/tex]

To find:

The correct values for the quadratic formula.

Solution:

If a quadratic equation is [tex]ax^2+bx+c=0[/tex], then the quadratic formula is:

[tex]x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}[/tex]

We have,

[tex]16x^2-20x-6=0[/tex]

Here, [tex]a=16,b=-20, c=-6[/tex]. Substituting these values in the above quadratic formula, we get

[tex]x=\dfrac{-(-20)\pm \sqrt{(-20)^2^2-4(16)(-6)}}{2(16)}[/tex]

Therefore, the quadratic formula for the given equation is [tex]x=\dfrac{-(-20)\pm \sqrt{(-20)^2^2-4(16)(-6)}}{2(16)}[/tex].

Answer:

-36

Step-by-step explanation:

We were given the expression as

(c3+d2)

Where our

c=-4

Then d= 10

Then substitute for the values of "c and d" in given expresion, we have

(c3+d2)

(-4)^3 + (10)^2

=-64 + 100

= -36

Answer:

134%

Step-by-step explanation:

Answer:

142,180 and 10 and 23 and that it

Answer:

7 1/5

Step-by-step explanation:

.2 is equal to 1/5 and then you add 7.