3 years ago

Is (-4x+9) squared a perfect square

1 answer:

5 0

Answer:

+ 6x + 9 ...so x2 + 6x + 9 is a perfect square trinomial. ... The first term, 16x2, is the square of 4x, and the last term, 36, is the square of 6. (4x)2 – 48x + 62.

Step-by-step explanation:

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Tickets to a school play cost $2 if bought in advance and $3 at the door. By selling all 400 tickets, $1030 was collected. First

Marrrta [24]

Answer:

170 tickets.

Step-by-step explanation:

Write formulas for the question.

$N_2+N_3=400$

$2N_2+3N_3=1030$

Then use substitution.

$N_2=-N_3+400$

$2(-N_3+400)+3N_3=1030$

$-2N_3+800+3N_3=1030$

$N_3=230$

So number of $3 tickets sold is 230. But they ask for the tickets bought in advance (i.e. the tickets sold for $2). Use substitution again.

$N_2+230=400\\N_2=400-230\\N_2=170$

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3 years ago

What is 4 1/5 as a percent

Nikitich [7]

4 1/5 is converted to 420%

Hope this helps!

5 0

3 years ago

Read 2 more answers

Simplify the expression and show your work. 4y+5=-31

kondor19780726 [428]

$4y +5=-31 \\ 
4y+5-5 = 31-5 \\ 
4y=-36 \\ 
4y/4=-36/4 \\ 
y=-9 \\ 
Check: \\ 
4(-9)+5=-31 \\ 
-36+5=-31 \\ 
-31=-31$

3 0

3 years ago

For a moving object, the force acting on the object varies directly with the object's acceleration. When a force of 28 N acts on

SVEN [57.7K]

Answer:

Step-by-step explanation:

F=ma

28=7m

m=28/7=4

F=4a

when a=3 m/s²

F=4×3=12 N

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2 years ago

The equation for area of a triangle is

stepan [7]

Answer:

h=2A/b

Step-by-step explanation:

I did the test

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3 years ago