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
kozerog [31]
3 years ago
8

4 x plus 8 y equals 40, when y equals 0.8?

Mathematics
1 answer:
Over [174]3 years ago
5 0

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{x = 8.4}}}}}

Step-by-step explanation:

Given, y = 0.8

To find : value of x

\sf{4x + 8y = 40}

plug the value of y

\longrightarrow{ \sf{4x + 8 \times 0.8 = 40}}

Multiply the numbers: 8 and 0.8

\longrightarrow{ \sf{4x + 6.4 = 40}}

Move 6.4 to right hand side and change it's sign

\longrightarrow{ \sf{4x = 40 - 6.4}}

Subtract 6.4 from 40

\longrightarrow{ \sf{4x = 33.6}}

Divide both sides by 4

\longrightarrow{ \sf{ \frac{4x}{4}  =  \frac{33.6}{4} }}

Calculate

\longrightarrow{ \sf{x  = 8.4}}

Hope I helped!

Best regards ! :D

You might be interested in
Graph A line goes through the point (6,–2) and has a slope of –3. What is the value of a if the point (a,7) lies on the line?
3241004551 [841]

Answer:

The value of a is 3

Step-by-step explanation:

First you have to make an equation based on the point and slope that you were given. The formula for this is y-(y cordinate of point)=slope(x-x cordinate of slope)

y--2=-3(x-6), which simplifies to y+2=-3(x-6)

In (a,7), 7 is the y coordinate. We have to plug 7 in for the y in our equation.

7+2=-3(x-6),

Combine like terms on the left side to get to 9=-3(x-6)

Multiply out on the left to get 9=-3x+18

Subtract 18 from the left side to get -9=-3x

Divide both sides by negative 3 to get 3=x (remember x is a)

7 0
2 years ago
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPp
love history [14]

Answer:

<u>36 in²</u>

Step-by-step explanation:

<u>Area of the figure</u>

  • Area (small rectangle) left + Area (big rectangle) right
  • 3 x (6 - 4) + 5 x 6
  • 3 x 2 + 30
  • 6 + 30
  • <u>36 in²</u>

3 0
2 years ago
Read 2 more answers
The hyperbola with center at (0, 0) opening horizontally, with a = 2, b = 5.
Finger [1]
I dont know if this is what you are looking for but i think this is the answer of the question you are looking for which is the general equation of a horizontal hyperbola: 
<span>(x-h)²/a² - (y-k)²/b² = 1 </span>
<span>with </span>
<span>center (h,k) 
</span>What you need to do is replace the data and do the calculations
8 0
3 years ago
A museum has a model of an Egyptian pyramid. It has a rectangular base that is 10 feet by 8 feet, with a height of 12 feet.
FrozenT [24]

Answer: 320ft^3

Step-by-step explanation:

Assuming the pyramid is just a normal rectangular pyramid and isn't made of stairs...

10x8x12/3 = 320 ft^3

7 0
3 years ago
What is the square root of 67
Inessa [10]

Every positive number has two square roots.

The square roots of  67  are  8.185... (rounded) and  -8.185... (rounded) .

Both are irrational numbers, so they can't be completely written down
with digits.  No matter how many decimal places I write, it can never be
enough, because these decimals go on forever and never end.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Mr. Williams physical education class is 7/8 hour. How many minutes are spent warming up and cooling down if these two together
    6·1 answer
  • Joaquín invirtió su dinero a 12% y a 15% obteniendo unos intereses de $3000. Si las cantidades que invirtió hubieran sido interc
    5·1 answer
  • at least $7500 with this event. Tickets for the fundraiser are $75.00 per couple, and they have to pay a $375 fee for renting th
    9·1 answer
  • You are given a list of students' names and their test scores. Design an algorithm that does the following: a. Calculates the av
    13·1 answer
  • I need help somebody help
    15·1 answer
  • The product of two consecutive integers is zero, find the integers. Show work
    5·1 answer
  • Write the vertex form by substituting in values for x, y, h, and k, and then solve for a. Show your work.
    15·2 answers
  • A bookmark shaped like a rectangle has a total perimeter of38cm the length of the one of its sides is 14 what is the width of ea
    13·1 answer
  • How to solve this? 10x+4y &lt; 12 8x-3y &gt; 20
    11·1 answer
  • This is the last one I promise!!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!