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

Answers

Answer 1

Answer: inpus 0.8 for y
4x+8(0.8)=40
4x+6.4=40
minus 6.4 both sides
4x=33.6
divie both sides by 5
x=8.4

x=8.4 when y=0.8

Answer 2

Answer: 4x+8y=40
4x + (8x.8)= 40
4x + 6.4 = 40
4x = 33.6
x = 8.4

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y=20x +2; x is any real number greater than or equal to 0, and y is any real number greater than or equal to 20.

Answers

Answer:

The answer is A. y = 2x + 20; x is any integer greater than or equal to, 0 and y is any integer greater than or equal to 20

Step-by-step explanation:

The gradient of the graph shown and given in its simplest form

Answers

Answer:

1/2

Step-by-step explanation:

Gradient=∆x/∆y

m=(0--1.5)÷(0-3)

m=1/2

A crane able can support a maximum load of 15,000 kg. If a bucket has a mass of2,000 kg and gravel has a mass of 1,500 kg for every cubic meter, how many cubicmeters of gravel can be safely lifted by the crane?

Answers

Let

x-------> amount of cubic meters of gravel that can be safely lifted by the crane

we know that

$15,000=2,000+1,500*x$

Solve for x

$15,000=2,000+1,500*x\n1,500*x=15,000-2,000\n1,500*x=13,000\n x=(13,000/1,500)\nx=8.67\ m^(3)$

therefore

the answer is

the amount of cubic meters of gravel that can be lifted safely by the crane cannot exceed $8.67\ m^(3)$

Well so 15000-2000 leaves 13000kgs of available weight allowed. Then 13000 divided by 1500 we get around 8.67 cubicmeters of gravel to be allowed to be lifted safely.

What is 2/3 of 800 equal to?

Answers

In math "of" means times, so...

2/3 of 800 =
2/3 × 800 =
1600/3 = 533 1/3

How many terms are in the arithmetic sequence 7, 0, –7, …,–175?

Answers

Answer:

27 terms

Step-by-step explanation:

a1 = 7

nth term is -175

common difference d= 0-7 = -7 or -7 - 0 = -7

nth term = first term + ( n-1) * common difference

-175 = 7 + ( n - 1 ) * (- 7)

-175 = 7 - 7n + 7

-175 = 14 - 7n

-175-14 = -7n

-189 = - 7n

n= -189 /-7

n=27

How to solve 6^x-2=1/4

Answers

you can solve it by take log( ) for both sides
6^x-2= 1/4
(x-2) log(6) = log(1/4)
(x-2) = log(1/4) / (log(6))
x-2= -0.774
x= -0.774 +2
x= 1.226

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