All categories

3 years ago

Find a so that the point (1,2) is on the graph of f (x)=ax^2+5

1 answer:

3 0

Answer: a = -5
Heyy, so with this question you would have to substiute 1 for x because normally the coordinates have x first then y. E.g. (x,y)

soo, f(1) = a(1)^2 +5
then, f(1) = a + 5
then equate to zero. E.g. a+5=0
then move over 5 to other side E.g. a=-5
soo.. yah.. pretty sure haha :)

You might be interested in

Given: angle 2 and angle 4 are vertical angles Prove: angle 2 congreunt angle 4

7nadin3 [17]

Answer:

Step-by-step explanation:

7 0

2 years ago

Simple interest question i need help with

alexdok [17]

Answer:

here you go, hope it's right

4 0

3 years ago

Ella completed the following work to test the equivalence of two express

murzikaleks [220]

Answer:

The expressions are not equivalent because Ella did not know that you can’t use substitution to test for equivalence.

Step-by-step explanation:

Equivalent algebraic expressions are those expressions which on simplification give the same resulting expression.

Two algebraic expressions are said to be equivalent if their values obtained by substituting any values of the variables are same.

Two expressions 3f+2.6 and 2f+2.6 are not equivalent, because when f=1,

$3f+2.6=3\cdot 1+2.6=3+2.6=5.6\\ \\2f+2.6=2\cdot 1+2.6=2+2.6=4.6\\ \\5.6\neq 4.6$

Method of substitution can only help her to decide the expresssions are not equivalent, but if she wants to prove the expressions are equivalent, she must prove it for all values of f.

$3f+2.6=2f+2.6\\ \\3f=2f\\ \\3f-2f=0\\ \\f=0$

This is true only when f=0.

Hence,

The expressions are not equivalent because Ella did not know that you can’t use substitution to test for equivalence.

5 0

3 years ago

Read 2 more answers

What is the exponent when you convert 71,100,000 into scientific notation?

UkoKoshka [18]

Answer:

Step-by-step explanation:

7.11 × 10^7

5 0

3 years ago

PLEASE HELP!!!!!!!!!!!!!! WILL MARK BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!

siniylev [52]

Answer:

(3); (-1/2); (-4)

Step-by-step explanation:

First, you should convert the equation into cubic form.

r(x)=(x^2+x−12)(2x+1)

2x^3 +3 x^2 − 23x− 12=0

Next, use the rational roots test to find the first root.

(-1/2) 

Using the factor theorem you can find the other roots.

(3) (-4)

4 0

4 years ago