1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
m_a_m_a [10]
4 years ago
11

4x-5y=13

Mathematics
1 answer:
love history [14]4 years ago
8 0
Hello : 
<span>4x-5y=13...(1)
x+5y=-3...(2)
(1)+(2) : 5x = 10
x=2
subsct in (2) : 2+5y = -3
5y =-5
y = -1

</span>
You might be interested in
U/5 + 6 = 2
Aloiza [94]

Answer:

D. -20

Step-by-step explanation:

\frac{u}{5} +6=2

\frac{u}{5} =-4

u=-4(5)

u=-20

Hope this helps!

4 0
2 years ago
Read 2 more answers
Is he cute ? Have wonderful day
zaharov [31]

Answer:

yeshhh

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
How many solutions<br> TYIA? :)
Doss [256]

Answer:

2 solutions

Step-by-step explanation:

The graphed lines intersect at two points and those two points would be your solutions.

Hope this helps!

7 0
3 years ago
Read 2 more answers
Bob sees a very tall white pine tree. He estimates that the angle of elevation from him to the top of the tree is 77°
vlabodo [156]

Answer:

  86.63 ft

Step-by-step explanation:

The tangent relation applies.

  Tan = Opposite/Adjacent

  tan(77°) = (tree height)/(20 ft)

  tree height = (20 ft)·tan(77°) ≈ 86.63 ft

_____

<em>Additional comment</em>

It is somewhat problematic for Bob to see the top of a white pine tree at that angle of elevation. His view would likely be obscured by the branches of the tree.

8 0
2 years ago
Michael was 1.0 metres tall, and could
Artist 52 [7]

Answer:

Lucy must walk up 80 steps to reach the 6th floor.

Step-by-step explanation:

Since Michael was 1.0 meters tall, and could only reach up to the 1st floor lift button, and from the 1st floor, he had to walk up 100 steps to reach the 6th floor; while Vinh was 1.4 meters tall, and could reach the 5th floor button, and he had to walk up 20 steps to reach the 6th floor; If Lucy was 1.1 meters tall, to determine how many steps did she have to walk up to reach the 6th floor, the following calculation must be performed:

1 = 100

1.4 = 20

1.4 - 1 = 100 - 20

0.4 = 80

0.1 = X

0.1 x 80 / 0.4 = X

20 = X

100 - 20 = 80

Therefore, Lucy must walk up 80 steps to reach the 6th floor.

4 0
3 years ago
Other questions:
  • Name all the perfect squares between 1 and 144
    5·2 answers
  • You and a friend play a game where you each toss a balanced coin. If the upper faces on the coins are both tails, you win $1; if
    15·1 answer
  • On Monday, the temperature dropped -30 degrees Fahrenheit from 1:00 pm to 7:00 pm. If the temperature change was the same every
    13·1 answer
  • Please answer , thank you
    6·1 answer
  • 31/25x=−62 find the value of x
    5·1 answer
  • The length of a side and the corresponding height of a triangle are (x+3) cm and (2x-5) cm respectively. Given that thr area of
    12·1 answer
  • Find the equation of the straight line that passes through the points (1, 10) and (3, 2)
    7·2 answers
  • Which of the following expressions are equivalent to -(-8/-4)1. -(-8/4)
    9·1 answer
  • 139 x 12 <br> 139 x 12<br> 139 x12
    14·2 answers
  • Slope = 2/5 On a Graph
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!