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klio [65]
3 years ago
9

What is the value of z in the equation 3z + 5 = 4z − 8? (4 points)

Mathematics
1 answer:
kobusy [5.1K]3 years ago
8 0
Is this multiple problems..?
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Please help me on this.<br>2x+3=4x+1​
Ainat [17]
Subtract 2x from each side
2x+3=4x+1
-2x -2x
3=2x+1
subtract 1 from each side
3=2x+1
-1 -1
2=2x
divide each side by 2
2=2x
1=x
4 0
3 years ago
Read 2 more answers
A student expanded an expression, as shown. Is the student's work correct? Explain why or why not.
alex41 [277]
The work is incorrect.

(-6) multiplies both terms inside parentheses. For some reason, the student changed the sign of that multiplier for the second term. The second term of the result should have a positive sign, the result of multiplying (-6)(-2/13) = +12/13.
4 0
3 years ago
Read 2 more answers
Make p the subject of a=p-2b<br> 2​
professor190 [17]

Answer:

p= a +2b

Step-by-step explanation:

Making p the subject of the equation means that we need to arrive at the final answer of p= ____.

a= p -2b

a +2b= p <em>(</em><em>+</em><em>2b</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>)</em>

p= a +2b

5 0
3 years ago
A ball is thrown at an initial height of 7 feet with an initial upward velocity at 27 ft/s. The balls height h (in feet) after t
lianna [129]

Answer:

The height of ball is 17 ft at t=0.55 and t=1.14.

Step-by-step explanation:

The general projectile motion is defined as

y=-16t^2+vt+y_0

Where, v is initial velocity and y₀ is initial height.

It is given that the initial height is 7 and the initial upward velocity is 27.

Substitute v=27 and y₀=7 in the above equation to find the model for height of the ball.

h(t)=-16t^2+27t+7

The height of ball is 17 ft. Put h(t)=17.

17=-16t^2+27t+7

0=-16t^2+27t-10

On solving this equation using graphing calculator we get

t=0.549,1.139

t\approx 0.55,1.14

Therefore the height of ball is 17 ft at t=0.55 and t=1.14.

3 0
3 years ago
The scale of map indicates that 5 inches represents 40 miles. If the distance between two locations on a map is represented by 8
shutvik [7]
I believe it is 64 miles.

Hope this helps! :)
4 0
3 years ago
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