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d1i1m1o1n [39]
3 years ago
9

What is (2x + 1)(3x + 7) simplified

Mathematics
2 answers:
AysviL [449]3 years ago
7 0

Answer:

6x^{2}+17x+7 and zeros are -7/3 and -1/2

Step-by-step explanation:

You multiply every property by every variable not in their own parentheses.

2x*3x=6x^2

2x*7=14x

3x*1=3x

7*1=7

6x^2+3x+14x+7

add like variables together 3x+14x

6x^2+17x+7

( To get the zeros just make each equation in the parentheses equal to zero and solve for x.) ex 2x+1=0   x=-1/2

motikmotik3 years ago
6 0

Answer:

6x^2+14x+3x+7=6x^2+17x+7

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7x - y = - 1 + -7x + 3y = - 25
Fittoniya [83]
Hope this helps you out :D

It’s 2 equations so in order to solve the previous system, you can use different methods, as for example substitution or addition of equations. In this case, you use the second one, due to the fact you have 7x in one equation and -7x in the other equation. In this way you can easily eliminate variable x and then solve for y. With the value of y you can replace in any of the two equations and solve for x.

7x-y=-1
-7x+3y=-25

Summarizing, you proceed as follow:
- add up the given equations

7x - y = -1

-7x+3y=-25
——————
0 +2y=-26

- solve for y in the previous equation

2y=-26
y=-26/2
y=-13


- replace the obtained value of y in one of the given equations, and solve for x

7x-(-13)=-1

7x+13=-1

7x=-1-13

7x=-14

x=-14

x=-14/7

x=-2


Hence, the solution of the given systems of equation is:

X=-2

Y=-13

4 0
3 years ago
Multiply.<br> 7.8 x 100<br> 7.83 x 10,000
luda_lava [24]
7.8 x 100 = 780
7.83 x 10,000 = 78,300
6 0
3 years ago
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Solve the literal equation, C = 12h + 4. Justify each step
IceJOKER [234]

Answer:

slope=.083

c=4

h=-0.333..

Step-by-step explanation:

8 0
3 years ago
19 Select the decimal that is equivalent to 27 Choose 1 answer: А 0.626 B 0.626 C 0.703 0.703 E None of the above ​
Natali [406]

Answer:

I am pretty sure it is none of the above but I don’t know for sure

7 0
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tatuchka [14]
Her new balance is her new balance would be 435
heres my math 
750-150-135=435
8 0
3 years ago
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