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
Natasha2012 [34]
3 years ago
7

What is the value of x in the equation 4x + 8y = 40, when y = 0.8?

Mathematics
2 answers:
Alona [7]3 years ago
8 0
4x+8y=40\\\\ \ \ \ \ when\ y=0.8:\\\\4x+8\cdot0.8=40\\4x+6.4=40\ \ \ \ |subtract\ 6.4\\4x=40-6.4\\4x=33.6\ \ \ |:4\\\boxed{x=8.4}
Zigmanuir [339]3 years ago
8 0
Now first of all we should plug in 0.8 to y .
now we have this simple equation: 4x+8.(0.8)=40
4x+6.4=40
4x=33.6
x=8.4  (hope it helps :) ) 
You might be interested in
For which inequality would x = 8 not be a solution?
Naya [18.7K]

Put the value of x to the inequality:

4x+3 > 0\\L=4(8)+3=32+3=35;\qquad R=0;\qquad L > R\ CORRECT\\\\9x-5 < 100\\L=5(8)-5=40-5=35;\qquad R=100;\qquad 35 < 100\ CORRECT\\\\x+4\leq10\\L=8+4=12;\qquad R=10;\qquad 12 > 10\ INCORECT (\leq)\\\\72\div x\geq4\\L=72\div 8=9;\qquad R=4;\qquad 9\geq4\ CORRECT

3 0
3 years ago
A triangle has one side measuring 16 inches and two sides measuring 13 inches. Is this triangle scalene?
nadya68 [22]

No, because a scalene triangle has to have all sides that are different lengths. 2 sides being 13 inches would mean that the triangle has 2 sides that are equal, making it an isosceles triangle.

3 0
2 years ago
Read 2 more answers
X-intercept=2; containing the point (-5,4), using either the general form or the slope-intercept form of the equation of a line.
Rus_ich [418]
The line contains point (2, 0) and (-5, 4).
y - 0 = (4 - 0)/(-5 - 2) (x - 2)
y = -4/7 (x - 2)
7y = -4(x - 2)
7y = -4x + 8
4x + 7y = 8
8 0
3 years ago
What is 38475 x 304944 ? My teacher won't let me use a calculator!
bearhunter [10]

Answer:

1,059,680,400

Step-by-step explanation:

7 0
2 years ago
HELP PLEASE!!!!!!! I NEED FAST!!
forsale [732]

The answer is b) 8.625.

Add green and red peppers, then divide it by 1.5.

5 0
3 years ago
Read 2 more answers
Other questions:
  • How do you solve 40,078-18,537?
    13·2 answers
  • True of false? A corollary is a statement that can be easily proved using a theorem.
    6·1 answer
  • Mr. Peters is planning to buy a new house. His friends suggest that he find out the actual dimensions of the property. What shou
    7·2 answers
  • Which equation is the equation of the line, in point-slope form, that has a slope of 2 and passes through the point (−8, 1) ?
    6·1 answer
  • Find (f - g)(5) when f(x) = 5x2 + 4 and g(x)=x<br>+3.<br>A) 121<br>B) 131<br>C) -134<br>D) 127<br>​
    15·1 answer
  • The volume of a cube is 64 cubic inches. what is the length of one side?
    8·1 answer
  • Can someone help prove if triangle MNP is an equilateral
    12·2 answers
  • What kind of polynomial has a degree of 2? Cubic Binomial Quadratic Linear
    15·1 answer
  • The temperature of magnesium must be at least 650° for the metal to melt. A sample of magnesium is currently 255°. The temperatu
    7·2 answers
  • Which equation is represented by the table
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!