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artcher [175]
3 years ago
10

Which step should be taken to isolate the variable in the following equation? LaTeX: 7d\:=\:497 d = 49 Group of answer choices A

. Add 7 to both sides of the equation B. Subtract 7 from both sides of the equation C. Multiply both sides of the equation by 7. D. Divide both sides of the equation by 7.
Mathematics
1 answer:
inysia [295]3 years ago
3 0

Answer:

D. Divide both sides of the equation by 7.

Step-by-step explanation:

Given expression:

7d=49

To determine the step used to isolate the variable in the above equation.

Step:

In order to isolate d in the above equation we would divide both sides of the equation by 7. By doing this the 7 on the left side would cancel out isolating d.

The step is done as follows:

7d=49

Dividing both sides of te equation by 7.

\frac{7d}{7}=\frac{49}{7}

∴ d=7

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AURORKA [14]
The answer is 6.7 mi.

Since the right triangle is present, to calculate this we will use the Pythagorean theorem. According to the Pythagorean theorem, the square of the hypotenuse (c²) is equal to the sum of the squares of two other sides (a² + b²)<span>:
c</span>² = a² + b²<span>

First, we need to express symbols:
b - side of the right triangle (distance </span><span>between police department and Freeport High School).
a1 - </span>side of the first right triangle (distance between library and Freeport High School).<span>
a2 - </span><span>side of the second right triangle (distance between park and Freeport High School).
c1 - hypotenuse of the first triangle (distance between </span>police<span> department and library).
c2 - </span>hypotenuse of the second triangle (distance between police<span> department and park).

Therefore, we need to calculate c2.
It is given:
a2 = 6 mi
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First, let's calculate b, which is a common side for two triangles:
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</span>b² = c1<span>² - a1²
</span>b² = 5<span>² - 4²
</span>b² = 25<span> - 16
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We know b, now we can calculate c2:
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</span>c2<span>² = 6² + 3²
</span>c2<span>² = 36 + 9
</span>c2<span>² = 45
</span>√c2<span>² = </span>√45
c2 = 6.7

The distance between police department and park is 6.7 miles.

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Step-by-step explanation:

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