Mathematics High School

Solve the quadratic equation.
-7n^2=-448
​

Answers

Answer 1

Answer:

n = 8

Step-by-step explanation:

-7n² = -448

=> n² = -448 / -7

=> n² = 64

=> n = [tex]\sqrt{64}[/tex]

=> n = 8

Hope it helps :)

Please mark my answer as the brainliest

Related Questions

At a used book sale, all the books cost the same price. Henry buys 4 paperback books for $3.20. Laney buys 9 books. How much does Laney pay for her books? Group of answer choices

Answers

Answer:

Henry: 12.80

Laney: 28.80

Step-by-step explanation:

A kite flying in the air has a 4-m line attached to it. Its line is pulled taut and casts a 3-m shadow. Find the height of the kite. If necessary, round your answer to the nearest tenth

Answers

Answer:

2.6

Step-by-step explanation:

I used the a^2+b^2=c^2 to get this answer. I squared all the number given and got 16 and 9. Then I subtract them to get 7. Finally square 7 off and got 2.6 as the final answer

Hope this helped

[tex] \sqrt{7} = 2.6[/tex]

1. Hayley designed and sold 35 hats for $11 each. She spent $200 on making the hats. How much profit did she make? show an complete answer and how you solved it.

Answers

Answer:

185

Step-by-step explanation:

11×35=385-200= 185

Which ratio is not equivalent to the other three? A 2 3 B 12 15 C 18 27 D 6 9

Answers

Answer: B= 12 15

Step-by-step explanation:

The given ratios are

A) 2 3= 2: 3  already in its simplest form

B)  12 15 =12:15 Changing to its simplest form, we divide both by 3 giving us           4:5

C)  18 27 =18: 27  Changing to its simplest form, we divide both numbers by 9 giving us =2:3        

D)6 9=6:9  Changing to its simplest form, we divide both by 3 giving us  

       2:3

Therefore the ratio not equivalent to other three is 12:15

i got griefed last time so help me out please

Answers

Answer:

Step-by-step explanation:

a)y=2x+3

b)y=2x+2

c)y=-2x+3

based on the results if 189 pizzas were sold, then how many could be expected to be cheese

Answers

Answer:

approximately 32

Step-by-step explanation:

ABC is reflected over the X axis. What are the vertices of A’B’C’?

Answers

Answer:

B

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Find the value of x.​

Answers

Step-by-step explanation:

[tex] log_{x}(16) = 2 \\ 16 = {4}^{2} \\ x = 4[/tex]

Hey can someone please help me solve system of equations I’m failing can y’all help me pleaseee

Answers

Cashier job pays $9 per hour
Delivering newspaper pays $8 per hour

y=1/3x-2
what would be y? and how to solve?
x y
-3 ?
0 ?
3 ?
6 ?

Answers

Y-intercept would be (0,-2)

The equation of a line in
slope-intercept form
is.
∙
y
=
m
x
+
b
where m represents the slope and

×
×
b, the y-intercept.
y
=
1
3
x
−
2
is in this form.
⇒
slope
=
1
3
and y-intercept
=
−
2
plot the point
(
0
,
−
2
)
using the slope, from -2 go up 1, across 3 to the right and

mark the point, that is (3,-1). Repeat for another point.

and draw a straight line through the points

graph{1/3x-2 [-10, 10, -5, 5]}

what is 314.16 rounded to the nearest hundredth

Answers

Since there is no number in the thousandths place which would make the number in the hundredths place round up or down, we keep the number the same:

314.16

Hope it helps! Good luck. :)

Hey can somebody get this for me been stuck for five min

Answers

Answer:

3

Step-by-step explanation:

it might be a semicolon instead of a comma I guess

I believe it is 1 because you might needa put a comma there.

2. help me i will give you brainliest

Answers

Answer:

B

Step-by-step explanation

If you do a squared plus b squared you’ll get c squared. It the Pythagorean theorem. It’s really easy the answer is 39

Pls answer..............

Answers

Answer:

b is correct

Step-by-step explanation:

B is the right answer I think!

if someone could please help me on this it would be amazing thank you so much

Answers

Answer:

7 cm squared

Step-by-step explanation:

not sure if its right but thats what i got round up to

I need the answer quick before my timer goes out

Answers

Answer:

c

Step-by-step explanation:

Answer:D

Step-by-step explanation:

I really need help..!

Answers

Answer:

B: 1/6

Step-by-step explanation:

make 1/4 to 3/12. 7/12 + 3/12 is 10/12. So the green is 2/12. 2/12 simplified is 1/6.

Answer:

B

Step-by-step explanation:

7/12=53%

1/4=25%

the remaining would be 16 % ad 1/6 is 16%

Someone help me I will give brainliest!

Answers

Answer:

600.06

Step-by-step explanation:

What is the pattern?

Answers

Answer\Pattern for the right side will continue by 2 and the pattern on the other left side the pattern will continue by -2.

Step-by-step explanation:

On the right side each time it is an addition of two
On the left side it is a -2

Can anyo help me thanks

Answers

Answer:

(-3, -5)

Step-by-step explanation:

We will multiply (6a -2b = -8) by -3, and (a - 3b = 12) by 2

Thus,

-18a + 6b = 24

2a - 6b = 24

=

-16a = 48

a= -3

Then we'll substitute,

-18(-3) + 6b = 24

54 + 6b = 24

6b = -30

b = -5

(-3, -5)

A company is going to make a water tank in the shape of a cylinder. As shown below, the tank will have a height of 2ft and a radius of 5ft. The tank will be made from metal (including its top and bottom). Suppose the total cost of the metal will be 8572.20. How much will the metal cost per square foot? Use 3.14 for pi, and do not round your answer.

Please give an understandable step-by-step explanation. Thank you !!

Answers

Answer:

$39 per square foot.

Step-by-step explanation:

The cylinder has a height of 2 feet and a radius of 5 feet.

The total cost of the metal will be (assuming US dollars) $8572.20.

And we want to determine the cost per square foot.

First, we can find the surface area of the cylinder. The surface area for a cylinder is given by the formula:

[tex]SA=2\pi r^2+2\pi rh[/tex]

Where r is the radius and h is the height.

Since the radius is 5 feet and the height is 2 feet and using 3.14 for π, the surface area is:

[tex]SA=2(3.14)(5)^2+2(3.14)(5)(2) =219.8\text{ feet}^2[/tex]

Therefore, to find the cost of metal per square foot, we can divide the total cost over the amount of surface area. Hence:

[tex]8572.20 / 219.8= \$ 39 \text{ per square foot}[/tex]

So, the metal costs $39 per square foot.

Find the equation of the line shown

Answers

Y = x + 6 is the correct answer

Using a calculator, work out:
V2704 * 2^2– V49

Answers

Answer:

201

Step-by-step explanation:

The computation is shown below:

Given that

[tex]= \sqrt{2704} \times 2^2 - \sqrt{49}[/tex]

= 52 × 4 - 7

= 208 - 7

= 201

Here we assume that V denotes the square so according to this we solve the given situation

After solving this, the answer is 201

plz answer only if u know ur correct

Answers

Answer:

1/2

Step-by-step explanation:

Answer:

Slope is 1/2

Step-by-step explanation:

Points (10,20) (30,30)

Y2-y1/x2-x1

30- 20/30-10

10/20

1/2

can someone please help me out asap​

Answers

100 km

so in 15 minutes the helicopter travelled 25km. So if 15 minutes goes into an hour 4 times then you times 25km by 4

Write an equation for the following sentence:
The sum of three times a number and 7 is 20.

Answers

Answer:

3x+7=20 is an equation for the sentence.

hope it is right answer for it

Answer:

3x+7=20 is an equation for the sentence.

hope it is right answer for it

Find the slope of the line
у
4
(1,4)
3
2
1
(0, 0) 3 4 5x
slope

Answers

Answer:

(0, 0)

Step-by-step explanation:

Help please I’m trying to do my homework and don’t understand

Answers

Answer:

Answer is 9.

I think this is helpful. Vote it and like me

Lydia buys 2 donuts. She cuts them up and shares them equally between 4 plates. What fraction of a donut goes on each plate? (2 points)
four over one donut
four halves donut
one fourth donut
two fourths donut

Answers

Answer:

The answer is four halves donut i believe

Step-by-step explanation:

Paul, Fiona and Pip share some sweets in the ratio 4:1:3. Paul gets 10 more sweets
than Pip. How many sweets are there altogether?

Answers

4x10= 40 sweets. (Paul)
1x 10= 10 sweets. (Fiona)
3x10=30 sweets (pip)
40+10+30= 80
80 sweets all together.
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