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makvit [3.9K]
3 years ago
12

Two students in mr d'alsesandro's class were asked to write an equivalent expression for the expression (a-6) (a-4). identify th

e student with the correct work and where the mistakes were in the other students work
gabrielles work


(a-6) (a-4)

= a.a = a(-4) - 6(a) - 6(-4)

= a ^2 - 4a - 6a - 24
= a^2 - 10a - 24




britneys work

(a-6) (a-4)
= a.a - 4a -6a -6(-4)
= a ^2 -10 a
+24
Mathematics
1 answer:
Ilya [14]3 years ago
3 0

Answer:

Britney is correct

Step-by-step explanation:

Gabrielle is wrong because when mutiply -6 and -4, the negatives cancel out to give +24.

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65 inches is how many feet? (Round to nearest hundredth) *
nalin [4]

Answer:

5.42 feet

Step-by-step explanation:

12 inches=1 foot

65/12=5.41667

5.41667=5.42 feet

7 0
2 years ago
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A garge floor measures 150 feet by 120 feet .a scale drawing on tbe floor on grid uses a scale of 1 unit : 15 feet what are the
o-na [289]

Answer:

8 units by 10 units

Step-by-step explanation:

150 \div 15 = 10 \\ 120 \div 15 = 8

8 0
3 years ago
What are the solutions to the equation <br><img src="https://tex.z-dn.net/?f=2%20%7Cx%20-%202%7C%20%20-%208%20%3D%2020" id="TexF
leva [86]

The solutions of the equation are -12 and 16

Step-by-step explanation:

Absolute value describes the distance of a number on the number line from 0 without considering which direction from zero the number lies. The absolute value of a number is never negative, if IxI = a, where a > 0, then

  • x = a
  • x = -a

∵ 2Ix - 2I - 8 = 20

- At first add 8 to both sides

∴ 2Ix - 2I = 28

- Then divide both sides by 2

∴ Ix - 2I = 14

Now By using the notes above equate x - 2 by 14 and -14

∵ x - 2 = 14

- Add 2 to both sides

∴ x = 16

∵ x - 2 = -14

- Add 2 to both sides

∴ x = -12

The solutions of the equation are -12 and 16

Learn more:

You can learn more about solving equations in brainly.com/question/2386054

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4 0
3 years ago
A rock is launched from a cannon. After 1 second, the rock is 58 feet in the air; after 2 seconds, it is 112 feet in the air. Us
max2010maxim [7]

Answer:

Step-by-step explanation: This is the quadratic function:

h(x)=ax²+bx+c

We have two points:

(1,58)

(2,112)

Now, we calculate this quadratic funtion.

we assume that h(0)=0

Therefore:

a(0)²+b(0)+c=0

c=0

(1,58)

a(1)²+b(1)=58

a+b=58  (1)

(2,112)

a(2)²+b(2)=112

4a+2b=112

2a+b=56  (1)

With the equations (1) and (2) we make a system of equations:

a+b=58

2a+b=56

we can solve this system of equations by reduction method.

-(a+b=58)

2a+b=56

---------------------

a=-2

-2(a+b=58)

2a+b=56

-------------------

      -b=-60  ⇒  b=60

The function is:

h(x)=ax²+bx+c

h(x)=-2x²+60x

Now find the height, in feet, of the rock after 10 seconds in the air.

h(10)=-2(10)²+60(10)

h(10)=-200+600=400

Answer: 400 ft.

8 0
2 years ago
Given: m || n , &lt;1 is congruent to &lt;3 <br> Prove: p || q
prisoha [69]
I would need see what your choices are to give exact answers, but I think the main idea here is to see that angles 1 and 3 are the same, and since the alternate interior angle theorem states parallel lines through a line, or another set of parallel lines, form equal angles on those positions, the lines that form those angles, p and q, must be parallel.
3 0
3 years ago
Read 2 more answers
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