3 years ago

Find f(4). f(x) = x2 + 2x - 3 A) 5 B) 11 13 D) 21 Elimina

Mathematics

1 answer:

grandymaker [24]3 years ago

3 0

Answer:D

Step-by-step explanation:

you plug 4 in for x

f(4)=4^2+2(4)-3

=16+8-3

=24-3

=21

You might be interested in

sophia is 6 years older than her brother eric. the sum of their ages is 28. write and solve an equation to find sophia and Eric'

Georgia [21]

28 - s - 6(Sophias age) = Sophia is twenty two and eric is 16.

3 0

3 years ago

Read 2 more answers

6 square root of 360n

sergey [27]

Square root 10 times 36 root n

5 0

4 years ago

Andrea needs 4 kilograms of oranges. The scale below shows the weight of the oranges she has in her kitchen. Part A. About how m

juin [17]

We know that

<span>each space on the balance represents
1 kg/ 10 spaces----------> 0.10 kg
in the picture there are 14 spaces
so
14*0.1-------> 1.4 Kg
</span>
Part A) About how many kilograms of oranges does Andrea have? Round your answer to the nearest kilogram

Andrea has 1.4 kg of oranges------> to the nearest kilogram-----> 1 Kg

the answer is
1 kg

Part B) About how many more kilograms of oranges does Andrea need?
Andrea needs=(4 Kg-1.4 Kg)------> 2.6 Kg

the answer part B) is
2.6 Kg

8 0

3 years ago

A blueprint of an office shows the bottom edge of the roof to be 54 feet above the ground. If the roof rises to a

frez [133]

Answer:

It is 4

Step-by-step explanation:

6 0

3 years ago

If alpha beta are the roots of the equation

Vikki [24]

Answer:

Step-by-step explanation:

Hello, I believe that we can consider a different from 0.

By definition of the roots we can write.

$ax^2+bx+c=a(x-\alpha)(x-\beta)=a(x^2-(\alpha + \beta)x+\alpha \cdot \beta)\\\\\text{So we can say that:}\\\\\alpha + \beta = \dfrac{-b}{a}\\\\\alpha \cdot \beta=\dfrac{c}{a}\\\\\text{So the expected quadratic equation is}\\\\(x+\dfrac{b}{a})(x-\dfrac{c}{a})=0\\\\ \Large \boxed{\sf \bf \ (ax+b)(ax-c)=0 \ }$

Thank you

8 0

3 years ago