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3 years ago

Solve for x 3x^2+18x+27=0 please help I am doing a unit exam on Khan academy and I need a A

Mathematics

1 answer:

Sphinxa [80]3 years ago

6 0

Answer:

X=3

Step-by-step explanation:

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

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Write a mathematical sentence that expresses the information given below. Use b as your variable name. If necessary:

ra1l [238]

The number of books owned by frank is represented as b < 150

<h3>What is inequality?</h3>

Inequality represents the form of writing expressions where the left hand side of the expression is not exactly equal to the right hand side of the expression

<h3>How to represent the required expression</h3>

Information gotten from the data include

Emily has 300 books

Frank were to double the number of books that he now owns, he would still have fewer than Emily has.

Let the number of books owned by frank be b and from the information we have that:

2b < 300

b < 150

hence the number of books owned by frank, b less than 150

Learn more on inequalities : brainly.com/question/28230245

#SPJ1

3 0

1 year ago

What is the length of the longest side of a right triangle if the two shorter sides are 5cm and 12 cm?

Leno4ka [110]

Answer:

13cm

Step-by-step explanation:

Using Pythagoras theorem, we have

H^2 = 5^2 + 12^2

= 25 + 144

= square root of 169

= 13cm

8 0

4 years ago

A snow plough has a 3.2m blade set at an angle of 30 degrees How wide a path will the snow plough clear

snow_tiger [21]

Answer:

1.6m

Step-by-step explanation:

The length of the blade is 3.2m

The angle which the blade makes is 30°

Assuming the path of the blade and the length it covers is a right-angled triangle,

The length of the blade is the hypothenus while the path at which it clears is the opposite of the triangle.

See attached document for better illustration.

Using SOHCAHTOA,

Sinθ = opposite / hypothenus

opposite = x

hypothenus = 3.2

θ = 30°

Sin30 = x / 3.2

X = 3.2sin30

X = 3.2 × 0.5

X = 1.6m

The path which the snow plough clears is 1.6m

6 0

3 years ago

a rain gutter is 24 feet long, 4 inches in height, 3 inches at base and 6 inches at top. how many gallons of water will it hold?

Lubov Fominskaja [6]

Answer:1.8701

Step-by-step explanation:

Area (A) of trapezium as marked is = $\frac{1}{2}$ $\left ( sum\ of\ parallel\ sides\right )\times height$

A= $\frac{1}{2}$ $\left ( 3+6\right )\times 4$

A=18 $in^2$

Now for Volume we have to multiply by length because area is same across the length.

volume(v)= $A\times length$

Volume(v)= $18\times 24$

Volume(v)=432 $in^3$

Volume(v)=1.8701 gallon

3 0

3 years ago

Sammy bikes 3 miles every night for exercise. It takes him exactly 1.75 hours to finish his ride. Assuming he rides at a constan

Allisa [31]

Answer:

jajaja y la novia

Step-by-step explanation:

7 0

3 years ago