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2 years ago

How many real solutions does the equation y=12x-9x+4 have?

1 answer:

3 0

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

y-(12*x^2-9*x+4)=0

Step by step solution :Step 1 :Equation at the end of step 1 : y - (((22•3x2) - 9x) + 4) = 0 Step 2 :Equation at the end of step 2 : y - 12x2 + 9x - 4 = 0 Step 3 :Solving a Single Variable Equation :

3.1 Solve y-12x2+9x-4 = 0

In this type of equations, having more than one variable (unknown), you have to specify for which variable you want the equation solved.

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Prove that: 1=SecB.CosB

Schach [20]

Answer:

Step-by-step explanation:

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3 0

3 years ago

50 POINTS Really need help, answer a. b. and c.

AleksandrR [38]

Answer:

a) 1 in : 6 in

b) P=32 inches

A =60 inches ^2

c) P= 16 ft

A = 15 ft ^2

Step-by-step explanation:

The drawing is 6 inches tall, while the real flag is 3 ft tall

Change ft to inches

3 ft * 12 inches/1ft = 36 inches

drawing : real life

6 36

Divide each by 6

1 6

The scale is 1 to 6

So for every 1 inch on the drawing, there is 6 inches in real life

b) P= 2(l+w) = 2(10+6) = 2(16) = 32 inches

A = l*w = 10*6 =60 inches ^2

The drawing is 10 inches by 6 inches

Multiply by the scale factor of 6

Real life is 60 inches by 36 inches

Divide by 12 to get back to ft

5ft by 3 ft

P= 2(l+w) = 2(5+3) = 2(8) = 16 ft

A = l*w = 5*3 =15 ft ^2

4 0

2 years ago

For some reason it says square but please help! I need to know step by step what to do.

quester [9]

Answer:

8.06 inches

Step-by-step explanation:

The diagram shows a rectangle with width of 4 inches and area of 28 square inches.

Use area formula:

$A_{\text{rectangle}}=\text{Width}\times \text{Length}$

So,

$28=4\times \text{Length}\Rightarrow \text{Length}=\dfrac{28}{4}=7\ \text{inches}$

By the Pythagorean theorem,

$\text{Diagonal}^2=\text{Width}^2+\text{Length}^2\\ \\\text{Diagonal}^2=4^2+7^2\\ \\\text{Diagonal}^2=16+49\\ \\\text{Diagonal}^2=65\\ \\\text{Diagonal}=\sqrt{65}\approx 8.06\ \text{inches}$

7 0

2 years ago

What is the remainder when the polynomial f(x)=3x^3-4x^2+2x+8 is divided by (x-5)

allsm [11]

Answer:

remainder = 290

Step-by-step explanation:

$\frac{3x^3-4x^2+2x+8}{x-5}$

= 3x² + 11x + 57 + $\frac{290}{x-5}$

quotient = 3x² + 11x + 57 and remainder = 290

6 0

3 years ago

Omgggg please please please help me I really really really need help on this. Please can you guys help me solve this problem?

Eddi Din [679]

Answer:

The volume of the figure is: 60840 $\pi ^3$ , or approximately about 191037.6 ft^3.

Step-by-step explanation:

This 3D figure can be split into two separate figures, a half-sphere, and a cone.

Let's first try to find the volume of the half-sphere.

The formula for the volume of the half-sphere is $\frac{2}{3}\pi r^3$ , so substituting 39 for r gives us a volume of 39546 $\pi \\\\$ ft^3, or about 124174.44 ft^3.

Next, let's find the volume of the cone. We see that the radius of the cone is once again 39 ft, and the height of the cone i s just 81-39, or 42 ft.

The volume of a cone is $(\pi r^2h)/3$ , and substituting 39 for r and 42 for h, we obtain a result of 21294 $\pi^3$ , or about 66863.16

Thus, the final volume of the figure is: 60840 $\pi ^3$ , or approximately about 191037.6 ft^3

4 0

3 years ago