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AlekseyPX
3 years ago
14

B) Find the value of 2a2 + 5b2 when a = -6 and b = 2

Mathematics
2 answers:
omeli [17]3 years ago
5 0

Answer:

2(-6)(2) + 5(2)(2)

-24 + 20

=-4

melomori [17]3 years ago
3 0

Answer:

-4

Step-by-step explanation:

if a = -6 and b = 2

2*-6*2 + 5*2*2 =  -24 + 20 = -4

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A team of students is designing a new game to help their class review for a science test. They will make a rolling cube
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3 0
3 years ago
A line passes through (2,-7) and (-3,3) find the slope intercept form of the equation of the line
dedylja [7]

first we can find the slope between the two points by using the slope formula

m=(y₂-y₁)/(x₂-x₁)

m=(3-(-7))/(-3-2)

m=(3+7)/(-3-2)

m=10/-5

m= -2

now that we have the slope, we can set up our equation. slope-intercept form is:

y=mx+b

where m is the slope and b is the y-intercept.

since we have the slope, we can choose one of the points that we are given to plug in for x and y, and then solve for b

-7 = 2(-2) + b

-7 = -4 + b

-3 = b

now that we have all the values we need, we can put it into our slope-intercept formula.

y=mx+b

y=-2x+(-3)

y = -2x -3

hope this helps

5 0
4 years ago
A=14<br> B=7<br> C=3.5<br> D=7 square root of 2
Delvig [45]

Answer:

7

Step-by-step explanation:

6 0
3 years ago
The height of a right circular cylinder is 1.5 times the radius of the base. What is the ratio of the total surface area to the
Naily [24]

Let r represent the radius of cylinder.

We have been given that the height of a right circular cylinder is 1.5 times the radius of the base. So the height of the cylinder would be 1.5r.

We will use lateral surface area of pyramid to solve our given problem.

LSA=2\pi r h, where,

LSA = Lateral surface area of pyramid,

r = Radius,

h = height.

Upon substituting our given values in above formula, we will get:

LSA=2\pi r\cdot (1.5)r  

Now we will find the total surface area of cylinder.

TSA=2\pi r(r+h)

TSA=2\pi r(r+1.5r)

TSA=2\pi r(2.5r)

\frac{TSA}{LSA}=\frac{2\pi r(2.5r)}{2\pi r(1.5r)}

\frac{TSA}{LSA}=\frac{2.5r}{1.5r}

\frac{TSA}{LSA}=\frac{25}{15}

\frac{TSA}{LSA}=\frac{5}{3}

Therefore, the ratio of total surface area to lateral surface area is 5:3.

4 0
3 years ago
Combine these radicals. √27- √3
Alex73 [517]
Square root 27 is 3squer root 3 so the answer is 2 square root three
8 0
3 years ago
Read 2 more answers
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