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3 years ago

6 problems, most of them I know but I need help on these by tomorrow so high point amount

Mathematics

2 answers:

Vlada [557]3 years ago

6 0

Answer:

y = -4x - 40

Perimeter = 5x^2 + 6x + 1

Area = 20x^3 + 23x^2 - 2x - 6

Step-by-step explanation:

That's how mafia works

Wittaler [7]3 years ago

4 0

Answer:

m = -4 is the slope

(x1, y1) = (12, 8) is a point on the line

The point-slope form is:

y - y1 = m(x - x1)

y - 8 = (-4)(x - 12)

The slope-intercept form is:

y = 8 + (-4)x + 16

y = (-4)x + 24

The standard form is:

y + (-4)x = 18 multiply both sides by 4

-4x = 18*4

-4x = 72

Step-by-step explanation:

2) Perimeter = 5x^2 + 2x -2

=7x^2 -2

L =49x -2

W=4x+3

49 -2 =47 x 16+3 = 19

A = 47x19

A = 893

P= 47+47+19+19= 132

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Estimate 3 2/5 to the nearest integer

pickupchik [31]

4 is the nearest integer

as a decimal this number would be 3.5, which would round up to 4.

8 0

3 years ago

Please help me solve for x =

Sladkaya [172]

Answer:

x = 13

Step-by-step explanation:

Given that Δ NML and Δ PST are similar right triangles, we can set up the following proportional statement to establish their relationship:

$\frac{ML}{NM} = \frac{ST}{PS}$

$\frac{8}{10} = \frac{x - 1}{x + 2}$

Cross multiply:

8(x + 2) = 10 (x - 1)

8x + 16 = 10x - 10

Subtract 8x from both sides:

8x - 8x + 16 = 10x - 8x - 10

16 = 2x - 10

Add 10 to both sides:

16 + 10 = 2x - 10 + 10

26 = 2x

Divide both sides by 2:

$\frac{26}{2} = \frac{2x}{2}$

13 = x

Verify whether x = 13 is the correct value:

$\frac{ML}{NM} = \frac{ST}{PS}$

$\frac{8}{10} = \frac{x - 1}{x + 2}$

$\frac{8/2}{10/2} = \frac{4}{5}$

$\frac{x -1}{x+2} = \frac{13 - 1}{13 + 2} = \frac{12}{15} = \frac{12 / 3}{15 /3} = \frac{4}{5}$

This shows the proportional relationship between $\frac{ML}{NM} = \frac{ST}{PS}$ , and that ΔNML and ΔPST are indeed similar right triangles.

Therefore, the correct answer is x = 13.

4 0

3 years ago

Place value of 2 in Decimal <br>137.5428

harina [27]

Answer:

0.002

Step-by-step explanation:

The explanation has been explained in the attached picture above.

6 0

3 years ago

Joan and her brother Justin left a hotel at the same time, driving in opposite directions at constant rates. After traveling for

inessss [21]

Answer:

Joan drive with a speed of 55 miles per hour.

Step-by-step explanation:

Given:- Travelling time (t) = 4 hours.

Travelled distance (d) = 480 miles.

Speed of Justin is 10 miles per hour faster than Joan.

To find:- Speed of Joan = ?

Solution:-

Let speed of Joan be x,

therefore speed of Justin = x+10 ---------------(from given)

Now, Total speed of Joan and Justin = x+x+10

Total speed of Joan and Justin = 2x+10 ------------(1)

Now formula for speed is,

Speed = $\frac{distance}{time}$

$2x+10=\frac{480}{4}$ -------------(from 1 and given)

$2x+10=120$

$2x=120-10$

$2x=110$

$\therefore x=\frac{110}{2}$

$\therefore x= 55$

as x is the speed of Joan,

Therefore Joan drive with a speed of 55 miles per hour.

6 0

3 years ago

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A search plane covers 50 square miles of countryside. How many hectares does the plane search?

LUCKY_DIMON [66]

The plane has searched 12,950 hectares. the ratio between hectares to square miles is: 1 hectare is 2.471 acres

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3 years ago

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