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qaws [65]
3 years ago
7

Please i will give brainly

Mathematics
2 answers:
d1i1m1o1n [39]3 years ago
8 0
A:x+3=11
B:X(to the power of 3) + 9
C:x-7=7
D:x(to the power of 3) = 3
serg [7]3 years ago
3 0
Equation for a
3x+11
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Two trains leave stations 360 miles apart at the same time and travel toward each other. One train travels at 70 miles per hour
cricket20 [7]
S=d/t     ⇒d=s*t
s=speed
d=distance
t=time

The first train :
d=x

x=70 miles/h*t                             ⇒   x=70t  (1)

The second train
d=360 miles - x

360 miles - x=80 miles/h*t          ⇒360-x=80t   ⇒ x=360-80t   (2)

therefore, with the equations (1) and (2) we have a systeme of equations:

x=70t
x=360-80t

we can solve this system of equations by equalization method.

70t=360-80t
70t+80t=360
150t=360
t=360/150=2.4     (≈2 hour  24 minutes)

Answer:  the first train meet with the second train in 2 hour 24 minutes. 


3 0
3 years ago
Read 2 more answers
The height of a 12-year-old boy increased by 17% last year and by 12% this year. What is the total increase in percentage terms?
murzikaleks [220]

Answer:

1. 12(1.17h) = 1.3104h Which is a 31.04% increase

Step-by-step explanation:


6 0
3 years ago
1. You are conducting a survey of the people in the United States to find out how popular racket sports (tennis, badminton, racq
andrey2020 [161]

Answer:

i think it's d

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
PYTHAGOREAN THEOREM IN 3D URGENT PLEASE PHOTO INSERTED
Andrews [41]

To find the length of the diagonal, we need to calculate the length of the base first and then use the value to calculate the diagonal since we are given the value of height of the triangle.

<h3>Pythagorean Theorem</h3>

This theorem is used to find the missing side of a right angle triangle given that we have the length of two sides.

To calculate the base of the triangle, let's use Pythagorean theorem here

x^2 = y^2 + z^2\\x^2 = 2^2 + 3^2\\x^2 = 4 + 9 \\x^2 = 13\\x = \sqrt{13} \\x = 3.61

Having the length of the base, let's consider the height of the triangle which is 6 and substitute the values.

d^2 = 6^2 + 3.61^2\\d^2 = 36 + 13.0321\\d^2 = 49.0321\\d = \sqrt{49.0321} \\d = 7.00

From the calculations above, the values of the triangle are

  • diagonal = 7
  • base = 3.61
  • height = 6

Learn more on pythagorean theorem here;

brainly.com/question/231802

#SPJ1

7 0
1 year ago
(4 + 3x + x2) + (6 – 9x + x2)
Gnoma [55]
If your looking for a simplified answer, it would be 2x^2-6x+10.

Hope this helps.
3 0
3 years ago
Read 2 more answers
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