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AfilCa [17]
3 years ago
9

1) What are the solutions of the equation? x^2 – 3x = 28? Asap please . 30 points

Mathematics
2 answers:
Sedbober [7]3 years ago
7 0
2-3x=28
-3x=28-2
-3x=26
X=-26/3
sammy [17]3 years ago
4 0

Answer:

Step-by-step explanation:

x²-3x-28=0

x²-7x+4x-28=0

x(x-7)+4(x-7)=0

(x-7)(x+4)=0

x=7,-4

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What property justifies that 6x+9/3 =2x + 3? (see the pic of how the fraction is)
spayn [35]

Answer:

C. Distributive property

Step-by-step explanation:

Distributive property says that

a\cdot (b+c)=a\cdot b+a\cdot c

Consider left part of the expression

\dfrac{6x+9}{3}=\dfrac{1}{3}\cdot (6x+9)

By distibutive property,

\dfrac{1}{3}\cdot (6x+9)\\ \\=\dfrac{1}{3}\cdot 6x+\dfrac{1}{3}\cdot 9\\ \\=2x+3

3 0
3 years ago
Solve the inequality: -7y - 3x < 21
SashulF [63]

Answer:

x>  -7/3y -7

Step-by-step explanation: -7y-3x<21

Step 1: Add 7y to both sides.

−3x−7y+7y<21+7y

−3x<7y+21

Step 2: Divide both sides by -3.

-3x/-3 < 7y+21/-3

x>-7/3y -7

7 0
3 years ago
This is just a random question don't answer im testing something out
notsponge [240]

Answer:

I think these should help.

Step-by-step explanation:

4 0
3 years ago
Which is a factor of 20x2 + 40x + 15?<br><br> 4x + 1<br> 4x + 3<br> 2x + 3<br> x + 2
maksim [4K]
C)
2x + 3
3 0
3 years ago
(x + 5 1/2) 0.75= 5/8 What is x?
swat32
<span>(x + 5 1/2) 0.75= 5/8<span>
Convert 0.75 into a fraction
</span></span><span>(x + 5 1/2) 3/4= 5/8
Use distributive property
3/4x + 5 1/2*3/4 = 5/8
Convert 5 1/2 into improper fraction
3/4x + 11/2*3/4 = 5/8
Multiply
3/4x + 33/8 = 5/8
Subtract 33/8 from both sides
3/4x = 5/8 - 33/8
Subtract the numerators but NOT the denominators
3/4x = -28/8
Divide 3/4 on both sides
x = -28/8 divided by 3/4
Convert the division sign to multiplication while flipping the fraction 3/4 to 4/3
x = -28/8 * 4/3
Multiply
Final Answer: x = -112/24 or -4 16/24 or -4 4/6 or -4 2/3 *All answers are equivalent to each other.</span>
7 0
3 years ago
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