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KonstantinChe [14]
3 years ago
9

Please help me it’s due today and I don’t understand!!!!

Mathematics
1 answer:
nadya68 [22]3 years ago
6 0

Answer:

A and B I believe

Step-by-step explanation:

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ILS.
abruzzese [7]

Answer:

its 1/4 :)

Step-by-step explanation:

8 0
3 years ago
Expan and simplify the following expression:<br> 3(2a + 3)(2a - 1) - 4 (a^2 - 7)
Mekhanik [1.2K]
= 3(4a^2 + 4a - 3) - 4a^2 + 28
= 12a^2 + 12a - 9 - 4a^2 + 28
= 8a^2 + 12a + 19
= 4a(2a + 3) + 19
3 0
3 years ago
What is the solution to the following system? 4x+3y-z=-6 6x-y+3z=12 8x+2y+4z=6
andrew-mc [135]

Answer:

Option B is correct.

Step-by-step explanation:

4x+3y-z= -6     eq(1)

6x-y+3z= 12     eq(2)

8x+2y+4z=6    eq(3)

We need to solve these equations and find the value of x, y and z.

Multiply equation 2 with 3 and then add equation 1 and 2

18x -3y +9z = 36

4x +3y -z = -6

_____________

22x + 8z = 30    eq(3)

Multiply equation 2 with 2 and add with equation 3

12x -2y + 6z = 24

8x +2y +4z = 6

____________

20x + 10 z = 30  eq(4)

Multiply equation 3 with 10 and equation 4 with 8 and then subtract

220x + 80z = 300

160x + 80z = 240

-        -            -

_________________

60x = 60

x= 60/60

x= 1

Putting value of x in equation 3

22x + 8z = 30

22(1) + 8z = 30

8z = 30 - 22

8z = 8

z = 8/8

z=1

Putting value of x and z in equation 1

4(1)+3y-(1)=-6

4 + 3y -1 = -6

3 + 3y = -6

3y = -6 -3

3y = -9

y = -3

so, Option B x=1, y=3 and z=1 is correct

8 0
3 years ago
Read 2 more answers
What is the equation of a line that passes through the point (8, −2) and is parallel to the line whose equation is 3x + 4y = 15?
klasskru [66]
Step 1: 3x + 4y = 15 
Step 2: Get in Slope intercept form = y=mx+b
Step 3: Subtract 3x from both sides since your trying to get Y alone
Step 4: 4y = -3x + 15
Step 5: Divide 4 from both sides since 4 cannot go into -3 or 15 leave it as is
Step 6: Y = - \frac {3}{4} + \frac{15}{4}
Step 7: Point slope form= y-y=m(x-x)
Step 8: (8, -2) are your points 8x and -2y
Step 9: Substitute
Step 10: y - 2 = -\frac{3}{4} (x - 8)
Step 11: Distribute
Step 12: y - 2 =-\frac{3}{4} x + -6
Step 13: Add 2 to both sides
Answer : y = - \frac{3}{4} x + 4
5 0
3 years ago
Read 2 more answers
In the following figure, m∠A = 55° and the m∠ACE = 86° . What is the m∠E = ? Show your work.
Paladinen [302]

the answer is

<E=31°.............. ..

3 0
3 years ago
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