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Misha Larkins [42]

2 years ago

9

If a = 1, find the values of b, c and d that make the given expression equivalent to the expression below.

1 answer:

vlada-n [284]2 years ago

8 0

Answer:

To do this, you need to multiply out the expressions. This is a bit tedious, but remember like FOIL for binomials, for these trinomials you must multiply each term. If you need a step-by-step, I'd be happy to provide it. Let me know.

Once you have simplified the expression, you get

-x-9/2x-4

But, the problem stipulates that a must equal 1. We can equivalently factor out the negative sign and put it on the denominator with no change to write

x+9/-(2x-4) = x+9/-2x+4

So, seeing where each coefficient corresponds between the two expressions, you get a = 1, b = 9, c = –2, and d = 4.

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PLEASE help me what’s the answers!!!!???

Grace [21]

1.) the answer would be D

2.) D

C=20+0.07(100)
C=20+7
C=27

3.) B

4y-10=22
+10 +10
4y=32
/4 /4
Y=8

4.)$132

60r+0.06(50r)=p
60(4)+0.06(50*4)=p
120+12=p
132=p

5.) $9.40

7+0.012(10,000-8,000)
7+0.0012(2,000)
7+2.4
9.4

6 0

3 years ago

What's the slope of the equations y = 2/3x + 5?

mixas84 [53]

Answer:

10/3 or 3.3

just do rise/ run

7 0

2 years ago

Solve the equation for all values of x by completing the square. 5x^2-70x=-230

Elina [12.6K]

Answer:

$x=7 + \sqrt{3}$

$x=7 - \sqrt{3}$

Step-by-step explanation:

Given equation:

$5x^2-70x=-230$

Divide both sides by 5:

$x^2-14x=-46$

Square half of the coefficient of $x$ : $(-14 \div 2)^2=49$
and add this to both sides:

$x^2-14x+49=-46+49$

Factor the left side and simplify the right side:

$(x-7)^2=3$

Square root both sides:

$x-7=\pm\sqrt{3}$

Add 7 to both sides:

$x=7 \pm \sqrt{3}$

4 0

2 years ago

Read 2 more answers

Justin is pouring a concrete walkway around his grandmother's rectangular garden. He wants the walkway to be 3 feet wide all the

sattari [20]

Answer: The area of the top of the walkway is 1,050 square feet

Step-by-step explanation:

Hi, to answer this question we simply have to apply the next formula:

Area of a rectangle: width x length (of the base)

Replacing with the values given and solving for A:

A = 25 feet x 42 feet = 1,050 square feet

In conclusion, the area of the top of the walkway is 1,050 square feet

Feel free to ask for more if needed or if you did not understand something.

8 0

2 years ago

If biology is 40% and chemistry is 24% and earth science is blank and so is physics. There are 4% more students signed up for an

san4es73 [151]

Given data:

The given biology percentage is B=40%.

The given chemistry percentage is C=24%.

The percenage of earth science as compare to physics is E=P+4%.

The expresion for the sum of all subjects is,

B+C+E+P=100%

40%+24%+E+P=100%

E+P=36%.............................(I)

Substitute given value in the above expression.

P+4%+P=36%

2P=32%

P=16%

The nummber of students assigned earth science is,

E=16%+4%

=20%

Thus, the percentage of the students assigned to the physics subject is 16%.

6 0

1 year ago