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3 years ago

F(x) = −5x2 − x + 20, find f(3).

Mathematics

1 answer:

Sholpan [36]3 years ago

3 0

Sub 3 for x
f(3)=-5(3)^2-(3)+20
f(3)=-5(9)-3+20
f(3)=-45+17
f(3)=-28

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If the product of two positive integers is 180 and the larger number is 5 times the smaller number, what are the numbers

Lubov Fominskaja [6]

Let the smaller number be x
The bigger number is 5x

5x(x) = 180
5x² = 180
x² = 180÷5
x²=36
x=√36
x = 6

x=6
5x = 6 x 5
5x = 30

So the two numbers are 6 and 30

7 0

3 years ago

A local department store sells carpet in 4 sizes. Each carpet comes in 3 different qualities. One of the sizes comes in 5 colors

e-lub [12.9K]

Answer:

23.

Step-by-step explanation:

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3 years ago

Parker drew a triangle with no cogruent sides and a 95° angle. Classify the triangle by the lengths of its sides and measures of

ss7ja [257]

Obtuse scalene, no equal sides, so no equal angles, and the one angle is over 90°

6 0

3 years ago

The height of a tree increases by 60% each year. When planted the tree was 40cm tall. How tall will the tree be in 5 years time.

Vikentia [17]

Answer:

≈419.4 cm.

Step-by-step explanation:

To solve this problem, you will need to set up an exponential graph as shown:

y= 40 · $(1.6)^{x}$

The 40 represents the initial height of the tree, while (1.6) represents the annual growth rate. 'x' represents the amount of years elapsed.

We can simply solve this by substituting 5 for x:

y= 40· $(1.6)^{5}$

y ≈ 419.4 cm.

8 0

3 years ago

The value of 6.8x10^2x1.3x10^-3 In standard form

marta [7]

Answer:

0.884

Step-by-step explanation:

When you multiply exponents together, you add the powers values together.

Step 1: Multiply base numbers

6.8(1.3) = 8.84

Step 2: Multiply (add) exponentials

$10^2(10^{-3}) = 10^{-1}$

Step 3: Combine into scientific notation

$8.84(10^{-1})$

Step 4: Evaluate into standard form

0.884

6 0

3 years ago

Read 2 more answers