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2 years ago

What is f(−3) for the function f(a)=−2a2−5a+4?

Mathematics

2 answers:

Gnesinka [82]2 years ago

7 0

Step-by-step explanation:

please mark me as brainlest

AleksAgata [21]2 years ago

6 0

Step-by-step explanation:

Hope it's helpful for you

pls mark above guy ans as brainliest

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Solve the simultaneous equation y-2x+1=0 and 4x^2+3y^2-2xy=7

Lapatulllka [165]

The first equation is $y-2x+1=0$

$y=2x-1$ (Equation 1)

The second equation is $4x^{2}+3y^{2}-2xy=7$ (Equation 2)

Putting the value of x from equation 1 in equation 2.

we get,

$4x^{2}+3(2x-1)^{2}-2x(2x-1)=7$

$4x^{2}+3(4x^{2}+1-4x)-4x^{2}+2x=7$

by simplifying the given equation,

$12x^{2}-10x-4=0$

$6x^{2}-5x-2=0$

Using discriminant formula,

$D=b^{2}-4ac$

$D=25-4 \times 6 \times -2 = 73$

Now the formula for solution 'x' of quadratic equation is given by:

$x=\frac{-b+\sqrt{D}}{2a} and x=\frac{-b-\sqrt{D}}{2a}$

$x=\frac{5+\sqrt{73}}{12} and x=\frac{5-\sqrt{73}}{12}$

Hence, these are the required solutions.

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2 years ago

A married couple had a combined annual income of 63,000. The wife made 7,000 more than her husband. What was each of their incom

Alchen [17]

The wife made 33,500 and the husband made 29,500

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2 years ago

Read 2 more answers

a mailing tube in the shape of cylinder has a height of 24 inches and a radius of 3 inches. what is the volume, in cubic inches,

TiliK225 [7]

ANSWER

The volume of the mailing tube is 678.6 square inches to the nearest tenth.

EXPLANATION

The volume of a cylinder is calculated using the formula;

$V=\pi \: {r}^{2} h$

Since the mailing tube is in the form of a cylinder, we use this formula to find its volume.

We substitute h=24 and r=3 to obtain,

$V=\pi \times {3}^{2} \times 24$

$V=216\pi {in}^{2}$

$V=678.6{in}^{2}$

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2 years ago

There are 30 students in the school chorale, and 12 of these students can stay after school today to help prepare the stage for

gtnhenbr [62]

Well it would be 12/30 but it could divide by 2 which equals 6/15 which can be divided by 3 which equals 2/5 so the answer 2/5

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2 years ago

84102 - 1052=? pasagot po pls with solution

lisov135 [29]

Answer:

83050

Step-by-step explanation:

that's the answer to the question

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1 year ago