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Lorico [155]
2 years ago
6

Debra is fertilizing her garden. The garden is in the shape of a rectangle. Its length is 12 feet and its width is 10 feet. Supp

ose each bag of fertilizer covers 30 square feet. How many bags will she need to cover the garden?
Mathematics
2 answers:
KonstantinChe [14]2 years ago
7 0

Answer:

If I'm correct the answer is 4

Step-by-step explanation:

Not 100% sure if I'm correct but if Debra's garden is 12 feet in length and 10 feet in width then you would multiply 10 × 12 that would be 120. Then divide 120 to 30 and you get your answer, 4. ( not 100% sure )

Alex_Xolod [135]2 years ago
4 0
She would need 40 bags.

First find the area of the rectangle by multiplying 10 and 12 ft together. You should get 120 sq ft. Then divide by the bags that cover 30 sq feet and you get 40. 40 bags are needed :)
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Which equation shows the quadratic formula used correctly to solve 5x2 + 3x – 4 = 0 for x?
vovikov84 [41]

Answer:

x=\frac{-3\pm\sqrt{(3)^2-4(5)(-4)}}{2(5)}

Therefore, Option 1 is correct.

Step-by-step explanation:

We have been given the quadratic equation:

5x^2+3x-4=0

If we compare it will general quadratic equation which is: ax^2+bx+c=0

Here, a=5,b=3 and c= -4.

Now, we will use the formula:

And then x=\frac{-b\pm\sqrt{D}}{2a}

Where,D=b^2-4ac

x=\frac{-3\pm\sqrt{(3)^2-4(5)(-4)}}{2(5)}

Therefore, Option 1 is correct.

6 0
3 years ago
Read 2 more answers
Write a polynomial function with rational coefficients so that P(x) = 0 has the given roots. 4, 16, and 1 + 9i
bulgar [2K]
I remember dis, yey

so if a polynomial has roots r_1, r_2, r_3, it can be factored into
f(x)=a(x-r_1)^b(x-r_2)^c(x-r_3)^d where a,b,c,d are constants

also, if a polynomial has rational coefients and a+bi is a root, then a-bi must also be a root


so our roots we need are
4,16, 1+9i and 1-9i

so assuming multiplity 1 (that means we have something like [/tex]f(x)=a(x-r_1)^1(x-r_2)^1(x-r_3)^1[/tex])

we get that your function is
P(x)=(x-4)(x-16)(x-(1+9i))(x-(1-9i)) which simplifies to
P(x)=(x-4)(x-16)(x-1-9i)(x-1+9i) which expands to
P(x)=x^4-22x^3+186x^2-1768x+5248
3 0
3 years ago
A box of 15 cookies costs $9.<br> MY<br> What is the cost for 1 cookie?
Nitella [24]

Answer: $0.6

Step-by-step explanation:

15cookies= $9

1 cookie = x

Cross multiply

15x= 9

Divide both sides by 15

x= 9/15= 3/5= $0.6

4 0
3 years ago
Read 2 more answers
could someone out there perhaps help me? i’m so lost even though it’s probably so simple. i’ll give you brainleist :)
Temka [501]

Answer:

y= -x+7, b= sqrt(2P/a), c=3P^2-b

Step-by-step explanation:

First, make a table regarding both of the equations. You will eventually find out that both lines intersect at the point (2, 5) after you find the points on the table. From there, subtract x from both sides in the equation x + y = 2. You will      get y = -x + 2. Since they said the line was parallel, find a line that has the slope of negative one. Since we know that this line intersects the point in which the first two lines intersect, we know that the y-intercept will be 7. The equation of the line would be y=-x+7.

Multiply both sides by 2. Then, divide both sides by a to get b^2=(2P/a). Take the square root to get the value of b, which is sqrt(2P/a).

Square both sides of the equation to get P^2=(b+c)/3. Cross multiply to get 3P^2=b+c. Subtract b from both sides to get c=3P^2-b.

8 0
3 years ago
The sales tax in Mansfield is 8.25% on anything purchased. What is the percent of the original price you will pay? Write your an
Fynjy0 [20]
If the tax was 10%, then you’d end up paying the original 100% plus the additional 10% tax, so you’d pay 110% of the original price.

In your example, it’s the same, except you have 8.25% tax, so you’d pay 100%+8,25% or 108.25% of the original price.
That’s stated as a percent.

To convert a percent to a decimal, you divide by 100:
108.25 ÷ 100 = 1.0825

To convert a decimal to a fraction, you have to know the place value of the smallest place. In this case, the 5 is in the ten thousandths place.
10825/10000

You can always double check that fraction on a calculator.
7 0
3 years ago
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