All categories

4 years ago

7x-4y=20 for y when x=3

2 answers:

8 0

$y=0.25$ or $\frac{1}{4}$ ; you first need to plug in the $x$ value, making the equation $7(3)-4y=20$ . Multiply $7$ and $3$ to get $21$ and then subtract it from $20$ in order to isolate the $y$ . This results in $-4y=-1$ . Then divide both sides by $-4$ and the answer would be $\frac{1}{4}$ , since dividing two numbers that have the same sign results in a positive number and $\frac{1}{4}$ can not be simplified any further, unless you are looking for the answer in decimal form, in which $y=0.25$ .

laiz [17]4 years ago

4 0

Y= 1/4 because 7(3)-4(1/4)

You might be interested in

What is the length of the base of a right triangle with an area of 24m and a height of 4m

insens350 [35]

To find the length of the base, we have to understand that area of triangle:

Base x height/2

Therefore we would multiply the area by 2 and divide by 4 to find the answer:

24x2/4

=48/4

=12

Therefore the answer is 12m.

Hope it helps!

4 0

4 years ago

Read 2 more answers

A right rectangular prism is packed with cubes of side length fraction 1 over 5 inch. If the prism is packed with 15 cubes along

Ann [662]

Given:

A right rectangular prism is packed with cubes of side length $\dfrac{1}{5}$ inch.

Prism is packed with 15 cubes along the length, 6 cubes along the width, and 5 cubes along the height.

To find:

The volume of the prism

Solution:

Side length of each cube $=\dfrac{1}{5}$ inch.

15 cubes along the length, so length of prism is

$l=15\times \dfrac{1}{5}=3\text{ inches}$

6 cubes along the width, so width of prism is

$b=6\times \dfrac{1}{5}=\dfrac{6}{5}\text{ inches}$

5 cubes along the height, so height of prism is

$h=5\times \dfrac{1}{5}=1\text{ inch}$

Now,

Volume of rectangular prism is

$V=l\times b\times h$

$V=3\times \dfrac{6}{5}\times 1$

$V=\dfrac{18}{5}$

$V=\dfrac{3\times 5+3}{5}$

$V=3\dfrac{3}{5}\text{ cubic inches}$

Therefore, the correct option is B.

7 0

3 years ago

A thermometer measures temperature to the nearest 0.5°C which measurement shows an appropriate level of precision for the thermo

statuscvo [17]

Answer:

Step-by-step explanation:

To the nearest 0.5°C means basically 1 digit after the decimal point.

0.5 has 1 digit (5), after the decimal point. To the nearest 0.5 means that the answer should have 1 digit after the decimal point.

For example, if we were to round 14, to the nearest 0.5, we would need to write it as 14.0 (with 1 digit after decimal).

Now, looking at the answer choices, we eliminate A because it has 2 digits after decimal. We eliminate B and C because there is NO DIGIT after decimal. And we accept D, because it has 1 digit after decimal. Hence, this is correct to the nearest 0.5°C.

Answer is D

5 0

4 years ago

Help me on this please

ruslelena [56]

Answe65

Step-by-step explanationthat the anews

3 0

3 years ago

What are the x and y intercepts for the equation 3y=12+2x

Finger [1]

Answer:

Step-by-step explanation:

Given that,

3y=12+2x

To find the x-intercept will set y=0 because, at the intercept of x, the value of y is 0

Then, y=0

3y=12+2x

3(0)=12+2x

0=12+2x

2x=-12

divide both sides by 2

x=-12/2

x=-6

Also, to get the y-intercept, let set x=0, because, at the intercept of y, x = 0

3y=12+2x

3y=12+2(0)

3y=12

Divide both sides by 3

y=12/3

y=4

So, y-intercept 4

Also, the x-intercept is -6

3 0

4 years ago

Read 2 more answers