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3 years ago

Helppppppppppppppppppppppppppppp

Mathematics

2 answers:

mafiozo [28]3 years ago

8 0

Answer:

1.) x=3 2.)n= -1/4 3.) h=7

Step-by-step explanation:

Sever21 [200]3 years ago

7 0

Step-by-step explanation:

#1 is x=3 father Johnathan :) <3

i love and miss you johnnie #wap #worshipandpray #winemom

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What's the answer for the attachment

gulaghasi [49]

ABC is not a right angled triangle

Solution:

Given that, Triangle ABC has perimeter 18 cm

AB = 7 cm

BC = 3 cm

We have to find whether ABC is a right angled triangle

Let the sides of triangle be AB, BC, AC

Perimeter of triangle is given by formula:

perimeter = sum of length of all three sides of triangle

18 = AB + BC + AC

18 = 7 + 3 + AC

AC = 18 - 10

AC = 8

Thus the length of sides of triangle are:

AB = 7 cm

BC = 3 cm

AC = 8 cm

For a triangle to be right angle, it must satisfy the pythagoras theorem

Pythagorean theorem, states that the square of the length of the hypotenuse is equal to the sum of squares of the lengths of other two sides of the right-angled triangle.

The longest side of triangle is hypotenuse

Therefore, AC = 8 cm is the hypotenuse

Thus by above theorem we get,

$AC^2 = AB^2+BC^2$

Substituting the values we get,

$8^2 = 7^2 + 3^2\\\\64 = 49 + 9\\\\64 \neq 58$

Thus the pythagoras theorem is not satisfied

Thus ABC is not a right angled triangle

6 0

3 years ago

Item 15The entrance of a tunnel can be modeled by y=−11/50(x−4)(x−24), where x and y are measured in feet. The x-axis represents

Evgen [1.6K]

Answer:

The with of the tunnel at the ground level is 20 feet

Step-by-step explanation:

The equation that model the entrance of the tunnel is y = -11/50(x - 4)(x - 24)

Where the dimensions of 'x' and 'y' are in feet and the x-axis represent the ground level

The y-axis represent the height, and the equation is a quadratic equation with the shape of an upside down parabola to represent the shape of the entrance to the tunnel

The two coordinates of the parabola at the ground level (where y = 0)

of the tunnel entrance from which we can find the width by subtraction are given when y = 0 as follows;

y = 0 = -11/50(x - 4)·(x - 24)

∴ (x - 4)·(x - 24) = 0/(-11/50) = 0

When (x - 4)·(x - 24) = 0, x = 4, or x = 24

The coordinates at the ground corners of the tunnel entrance are therefore;

(4, 0), and (24, 0)

The with of the tunnel at the ground level is equal to the width of the parabola at the x-axis, which is given as follows;

The width of the parabola at the x-axis = Distance between points (4, 0), and (24, 0)

∴ The width of the parabola at the x-axis = √((0 - 0)² + (24 - 4)²) = √(24 - 4)² = 24 - 4 = 20 (distance between points having the same y-coordinates)

The width of the parabola at the x-axis = 20 ft. = The with of the tunnel at the ground level

∴ The with of the tunnel at the ground level = 20 feet.

8 0

3 years ago

JUANITA WANTS TO PARTICIPATE IN A 20 KILOMETER BICYCLE RACE. SHE IS CONSIDERING TWO TRAINING PROGRAMS BELOW. PROGRAM A: RIDE 10

barxatty [35]

She would ride 17,343.75 kilometers in three days because the first day is 7,500 meters and the get the third day you multiply that by .75 which would be 5,625, and to get the third day you would multiply the 5,625 by .75 to get about 4,218. Lastly, you would add the three numbers together

4 0

3 years ago

If you look at the second graph and were to add the percentages, they add far higher than 100%. Why is that the case?

ser-zykov [4K]

Answer:

They could have asked more than 100 people or it just went over because of the percentages and they didn’t know

Step-by-step explanation:

5 0

3 years ago

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Frank and Keiko each ran every day as part of an exercise routine. Frank ran 3 miles each day for x days. Keiko ran 4 miles each

Gennadij [26K]