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3 years ago

Evaluate 8 - 4.7y - x, when y = -1 and x = 2. A. -10.7 B. -9.7 C. 9.7 D. 10.7

Mathematics

1 answer:

seraphim [82]3 years ago

5 0

It’s D, 10.7

8 - (4.7 x (-1)) - 2 = 10.7

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If the life span of a light bulb is 2500 hours, approximately how many weeks can you

Tomtit [17]

● Answer:

~~ 15 weeks

● Step-by-step explanation:

1 week = 7 days = 7×24hours = 168 hours

2500 hours ÷ 168 hours = 14.88 hours

~~ 15 weeks

5 0

3 years ago

8+5n is greater then or equal to 4 (n+8)

Semmy [17]

It would depend on what n was equal to

8 0

3 years ago

Read 2 more answers

X and y vary inversely and x=50 when y=5 find y when x=10 what is k?

Kisachek [45]

Answer:

Part A)

1) $k=250$

2) $y=25$

Part B)

1) $k=7$

2) $y=84$

Step-by-step explanation:

Part 1) x and y vary inversely and x=50 when y=5 find y when x=10 what is k?

we know that

A relationship between two variables, x, and y, represent an inverse variation if it can be expressed in the form $y*x=k$ or $y=k/x$

step 1

Find the value of k

x=50 when y=5

substitute the values

$y*x=k$ ------> $5*50=k$ -----> $k=250$

The equation is equal to

$y*x=250$ or $y=250/x$

step 2

Find y when x=10

substitute the value of x in the equation and solve for y

$y*(10)=250$

$y=250/10=25$

Part B) x and y vary directly and x=6 when y=42 find k what is y when x=12

we know that

A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form $y/x=k$ or $y=kx$

step 1

Find the value of k

x=6 when y=42

substitute the values

$y/x=k$ ------> $42/6=k$ -----> $k=7$

The equation is equal to

$y/x=7$ or $y=7x$

step 2

Find y when x=12

substitute the value of x in the equation and solve for y

$y=7(12)=84$

5 0

3 years ago

26.48 divided by 2 and the method

e-lub [12.9K]

Answer:

13.24

Step-by-step explanation:

If you put it into the calculator, you get the answer. Or you could do long division, but that's difficult for no reason. You could also divide each number individually by 2, as they are all even, so that works too.

Hope this helps!

7 0

3 years ago

Helppppp pleasee....

irina1246 [14]

Independent variable: the variable that affects the dependent variable and creates a change
Dependent variable: depends on the independent variable

1. Independent variable: John’s age
Dependent variable: height

2. Independent: gallons of milk
Dependent: cups of milk

3. Independent: population
Dependent: number of representatives

4. Independent: Number of seats
Dependent: amount of tickets

5. Independent: time
Dependent: plane’s altitude

6. Independent: more music download
Dependent: more money spent

6 0

3 years ago