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Temka [501]
3 years ago
11

Need Help BadlyWhat is the solution

Mathematics
1 answer:
Kamila [148]3 years ago
5 0
Sqrt(1-3x)=x+3
[sqrt(1-3x)]^2=(x+3)^2
1-3x=(x+3)(x+3)
1-3x=x^2+6x+9
-3x=x^2+6x+8
0=x^2+9x+8

The answers are -1 and -8 BUT, we have to plug them back into the original equation to make sure we don't get a negative under the square root sign.

After doing this, we realize that only -1 works, so the answer is x=-1

Sorry that this took forever to answer. I was thinking of a good way to explain this, and if you need any further explanation, message me:)

Best wishes:)


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Sarah, Natasha and Richard share some sweets in the ratio 4:5:3. Sarah gets 36 sweets. How many sweets are there altogether?
strojnjashka [21]

Answer:

40

Step-by-step explanation:

4 0
3 years ago
An image point after a 180 rotation is (3,7). What were the coordinates of the pre-image point?(A)Z(-3,-7) (B)Z(7,3) (C)Z(-7,-3)
Ilia_Sergeevich [38]

Answer:

(A)Z(-3,-7)

Explanation:

The rotation of a point (x,y) by 180 degrees gives the point (-x,-y).

That is:

\text{Rotation by }180^0=(x,y)\rightarrow(-x,-y)

If the image point after rotation is (3,7), the coordinates of the pre-image will be:

(x,y)=Z(-3,-7)

The correct option is A.

4 0
1 year ago
Identify m∠F. PLEASE HELP!!
inysia [295]

Answer:

D. <F = 65 degrees

Step-by-step explanation:

First off, we know that the measures of <F and the angle adjacent to it add to 90 degrees, as indicated by the right angle. They are complementary angles.

The complementary angle of <F has an intercepted arc of 50 degrees. Because the angle is on the opposite end of the circle, it is half of the measure of the arc. Therefore, it is 25 degrees.

Because this angle and <F sum to 90, just subtract 90-25 to find <F.

<F = 65 degrees

7 0
3 years ago
Re-write the quadratic function below in Standard Form<br> y = 3(x + 3)2 – 3
vivado [14]

Answer:

y=6x+15

Step-by-step explanation:

8 0
3 years ago
Which equation is equivalent to 4. 5 = 2a? a = 2. 5 a = 2. 25 4. 5a = 2 a 2 = 4. 5.
Art [367]

Answer:

a=2.25

Step-by-step explanation:

Given the equation 4.5=2a, you'd finds the value of "a" and divide both sides by 2.

4.5/2=a

2.25=a

a=2.25

6 0
3 years ago
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