3 years ago

What is a zero of the function f(x) = 5x-20

Mathematics

1 answer:

Svetlanka [38]3 years ago

7 0

That is where the function equals 0
0=5x-20
add 20 both sides
20=5x
divide 5
4=x

the zero is at x=4
(4,0)

You might be interested in

A line is drawn so that it passes through the points (-3, -1) and (4, 2).

marishachu [46]

Answer:

(A) $\boxed{\bold{y=\frac{3}{7}x+\frac{2}{7}}}$

(B) $\boxed{\bold{2 \ = \ \frac{3}{7} * \ 4 \ + \ \frac{2}{7} }}$

Explanation:

(A) Slope: y = mx + b

m = 3/7

b = 2/7

Slope = $\bold{\frac{y_2-y_1}{x_2-x_1}}$

$\bold{\left(x_1,\:y_1\right)=\left(-3,\:-1\right),\:\left(x_2,\:y_2\right)=\left(4,\:2\right)}$

M = $\bold{\frac{2-\left(-1\right)}{4-\left(-3\right)}: \ \frac{3}{7} }$

Y intercept

$\bold{y=\frac{3}{7}x+b}$

Plug in $\bold{\left(-3,\:-1\right)\mathrm{:\:}\quad \:x=-3,\:y=-1}$

$\bold{-1=\frac{3}{7}\left(-3\right)+b}$

Isolate B

$\bold{-1=\frac{3}{7}\left(-3\right)+b}$

b = $\bold{\frac{2}{7} }$

(B) 4 = x, 2 = y

2 = 3/7 * 4 + 2/7

5 0

3 years ago

Read 2 more answers

State whether the following uses inductive or deductive reasoning: What goes up, must come down. When you throw a baseball up in

Juli2301 [7.4K]

Yes the baseball will come down because of gravity

3 0

3 years ago

Read 2 more answers

Liam has purchased a fee-for-service health insurance plan from Leroux Health Insurance. Plan A includes a $248.00 monthly premi

Lerok [7]

Liam will only have to pay $211 per month for health care related feed this year because the annual deductibles will only be in effect if he continues to visit his physician and chiropractor regularly. This will put the insurance company at ease that he is at his most healthy state.

8 0

3 years ago

Read 2 more answers

Between which 2 numbers on a number line will √20 be found?

ehidna [41]

Answer:

Since the square root of 20 is around 4.5, we know that ≈4.5 is almost at the half mark between 4 and 5 on the number line.

4 0

2 years ago

Andrew owns a lawn-mowing business which contracts with 43 customers each week. Last week the business earned $870.75. How many

Anton [14]

Answer: