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2 years ago

What is the value of the expression below when x = 4 and y = 4? 3x + 7y

Mathematics

2 answers:

Diano4ka-milaya [45]2 years ago

7 0

Answer:

Step-by-step explanation:

3x + 7y

Replace the letters with said numbers,

3(4) + 7(4)

Multiply,

12 + 28

And add!

Delvig [45]2 years ago

7 0

Answer:

3(4)+7(4)=40

Step-by-step explanation:

x=4

y=4

3x + 7y

3(4)+7(4)

3x4=12

7x4=28

12+28=40

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Saturn is 8.867 × 10^8 miles away from the Sun. Uranus is 1.787 × 10^9 miles away from the Sun. Approximately how many times far

Over [174]

Answer:

2 times

Step-by-step explanation:

Please refer to the image attached of our solar system in which Saturn and Uranus are clearly visible.

Distance of Saturn from Sun, $D_{1} = 8.867 \times 10^{8}\ miles$

Distance of Uranus from Sun, $D_{2} = 1.787 \times 10^{9}\ miles$

We have to find, how many times the Uranus is far from Sun than Saturn is far from Sun.

Let us begin by multiplying the distance of Saturn from Sun by 2: $D_{1} \times 2 = 8.867 \times 10^{8}\ miles \times 2\\\Rightarrow 17.734 \times 10^{8}\ miles\\\Rightarrow 1.7734 \times 10^{1} \times 10^{8}\ miles\\\Rightarrow 1.7734 \times 10^{8+1}\ miles\\\Rightarrow 1.7734 \times 10^{9} $\approx$ D_{2}$

From above, we can say that $D_{2}$ is approximately twice of $D_{1}$ .

In other words, we can say that Uranus is at approximately twice distance from Sun than that of Saturn is.

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