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Elena-2011 [213]

3 years ago

5

What is the answer to x-2=7

1 answer:

saul85 [17]3 years ago

6 0

x-2=7

apply additon property of equality

x-2+2=7+2

x=9

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Just tell me what to write in the boxes Example in box 1 write .....

BigorU [14]

In box one you have to distribute so -2(3x-5)= -6x-(-10)

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4 years ago

What is the initial value?

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Step-by-step explanation:

In the field of differential equations, an initial value is an ordinary differential equation together with a specific value, cut the initial condition, of the Unknown function at a given point.

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3 years ago

Solve the following system of equations by substitution. Show all steps.

Alinara [238K]

Answer:

Given system of equations:

$\begin{cases}f(x)=-x^2+2x+3\\g(x)=-2x+3\end{cases}$

To solve by substitution, equate the equations and solve for x:

$\begin{aligned}f(x) & = g(x)\\\implies -x^2+2x+3 & = -2x+3\\-x^2+4x & = 0\\x^2-4x & = 0\\x(x-4) & = 0\\\implies x & = 0\\\implies x-4 & = 0 \implies x=4\end{aligned}$

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To find the y-values of the solution, substitute the found values of x into the functions:

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2 years ago

Two skiers are 30 kilometers apart and head towards each other. They meet in 2 hours. If the second skier is 5 kilometers per ho

DENIUS [597]

Answer:

Speed of first skier = 5 km/h

Speed of second skier = 10 km/h

Step-by-step explanation:

Given:

Distance between skiers = 30 km

Time after which they meet = 2 hours

Second skier is 5 km/h faster than the first skier.

To find speed of each skier.

Solution:

Let the speed of first skier be in km/h = $x$

<em>Distance covered in km 2 hours will be = $Speed\times time=x\times 2=2x\ km$ </em>

Speed of second skier in km/h can be given as = $x+5$

<em>Distance traveled by second skier after 2 hours will be = $Speed\times time=(x+5)\times 2=(2x+10)\ km$ [Using distribution]</em>

Since, the skiers were 30 km apart initially, so the total distance covered by both of them when they meet after 2 hours will be = 30 km

Thus, we have:

$2x+2x+10=30$

Solving for $x$

$4x+10=30$

Subtracting both sides by 10.

$4x+10-10=30-10$

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Dividing both sides by 4.

$\frac{4x}{4}=\frac{20}{4}$

$x=5$

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3 years ago

. Asking 100 students at a large university for their opinions on campus life is an example of measuring a _____.

Slav-nsk [51]

Answer:

B

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3 years ago

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