All categories

3 years ago

Evaluate the expression if a = 4 , b = 9. and c = 1. A. –27 B. –9 C. 9 D. 27

Mathematics

1 answer:

elena55 [62]3 years ago

3 0

Answer:

I don't know if you want to find this answer using the quadratic formula or not, the question is no the greatest but i will solve it the best that i can. Or

Step-by-step explanation:

I used the discriminant which is √ $b^{2}$ -4ac

Then I filled the numbers in, and found that 9 gets plug in for b and this becomes 9 squared, and that becomes 81. 4 is multiplied to 4 and 1 and becomes 16. Then 81 and 16 are subtracted and we get 65. We then find the square root, and will find that the answer is C.

Hoped this helped thanks, if you need more help let me know.

You might be interested in

Which of the following is the expansion of (3c + d2)6? 729c6 + 1,458c5d2 + 1,215c4d4 + 540c3d6 + 135c2d8 + 18cd10 + d12 729c6 +

Airida [17]

Answer:

(. A. )729c^6 + 1,458c^5d^2 + 1,215c^4d^4 + 540c^3d^6 + 135c^2d^8 + 18cd10 + d^12

Step-by-step explanation:

BRAINLIEST PLEASE? :,)

4 0

3 years ago

Read 2 more answers

Helppppppppppp I rlly need help

Flura [38]

Answer:

Number 3 5x + 2y =z

Step-by-step explanation:

4 0

3 years ago

On a recent trip to a local orchard, the Morgan family picked four different kinds of apples - Braeburn, Cortland, Fuji, and Rom

ivanzaharov [21]

Answer:

Morgan family picked 144 Braeburn apples, 96 Cortland apples, 72 Fuji apples and 48 Rome apples.

Step-by-step explanation:

Let B, C, F and R represent Braeburn apples, Cortland apples, Fuji apples, and Rome apples respectively.

We have been given that Morgan family picked a total of 360 apples. We can represent this information in an equation as:

$B+C+F+R=360...(1)$

We are told that Morgan family picked twice as many Braeburn as Fuji. We can represent this information in an equation as:

$B=2F...(2)$

We are told that Morgan family picked twice as many Cortland as Rome, that is:

$C=2R...(3)$

We are told that Morgan family picked 50% more Fuji than Rome, that is:

$F=1.5R...(4)$

Upon substituting equation (4) in equation (2), we will get:

$B=2(1.5)R$

$B=3R$

Now, each apple in in terms of Rome apples, so we will get:

$3R+2R+1.5R+R=360$

Let us solve for R.

$7.5R=360$

$\frac{7.5R}{7.5}=\frac{360}{7.5}$

$R=48$

Therefore, Morgan family picked 48 Rome apples.

Upon substituting $R=48$ in (3), we will get:

$C=2R\Rightarrow 2(48)=96$

Therefore, Morgan family picked 96 Cortland apples.

Upon substituting $R=48$ in (4), we will get:

$F=1.5R\Rightarrow 1.5(48)=72$

Therefore, Morgan family picked 72 Fuji apples.

Upon substituting $F=72$ in (2), we will get:

$B=2F\Rightarrow 2(72)=144$

Therefore, Morgan family picked 144 Braeburn apples.

3 0

3 years ago

Which equations are equivalent to Y=2/3X-4 when written in slope-intercept form? Check all that apply. A =3X-2Y=4. B=2X-3Y=12. C

shusha [124]

The slope-intercept form: y = mx + b.

The standard form: Ax + By = C.

We have:

$y=\dfrac{2}{3}x-4$ <em>multiply both sides by 3</em>

$3y=2x-12$ <em>subtract 2x from both sides</em>

$-2x+3y=-12$ <em>change the signs</em>

$2x-3y=12\to\boxed{B.}$ <em>multiply both sides by (-4)</em>

$-4(2x-3y)=-4(12)\to\boxed{C.}$

<h3>Answer: B and C.</h3>

A. 3x - 2y = 4 - NOT

D. 2(x + 6) = 3y → 2x + 12 = 3y → 2x - 3y = -12 - NOT

E. 2x - 3y = 4 - NOT

6 0

3 years ago

Read 2 more answers

Kevin is serving water at a restaurant. The pitcher holds 1 gallon of water. If each glass holds 8 ounces of water, how many gla

iris [78.8K]

I think it can fill 16 glasses (:

7 0

4 years ago