Someone please help me I don’t understand

Mathematics

1 answer:

Rudiy272 years ago

4 0

First you need to find the area of the base of the triangle. On the base of the triangle you use the area of a triangle formula which gives you: 1/2(20*21) which is 210. Now you have the area of the base. To find the volume (the storage space) you need to use the formula V=Area of base(height). This would then equal V = 210 (72). Finally that equals 15,120.

Your final answer is 15,120 cubic inches of space.

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How do you do 3.)and 3.a)

malfutka [58]

1 cm : 15 yd
Multiply this proportion by 5
5 cm : 75 yd

Multiply the original proportion by 8
8 cm : 120 yd

a) The dimensions of the field are 75 yd by 120 yd.

b) The area is (75 yd)*(120 yd) = 9000 yd^2.

7 0

4 years ago

The function f(x) = –x2 – 4x + 5 is shown on the graph. On a coordinate plane, a parabola opens down. It goes through (negative

madam [21]

The true statement is:

"The range of the function is all real numbers less than or equal to 9."

<h3>Which statements are true?</h3>

Here we have the quadratic function:

$f(x) = -x^2 - 4x + 5$

And we want to see which of the given statements are true.

The first one is:

"The domain is al real numbers less than or equal to -2"

This is false, for all quadratic functions the domain is the set of all real numbers (unless the domain is defined).

The second statement is:

" The domain of the function is all real numbers less than or equal to 9."

Also false

Third one:

" The range of the function is all real numbers less than or equal to −2"

The range of a quadratic function with a negative leading coefficient will be the set of all the values smaller than the y-value of the vertex.

In this case, the quadratic function is:

$f(x) = -x^2 - 4x + 5$

So the vertex is at:

$x = 4/(2*-1) = -2\\$