All categories

2 years ago

Solve equation by using the quadratic formula. 25 x squared minus 169 = 0

Mathematics

1 answer:

NISA [10]2 years ago

7 0

Answer:

x = 13/5 or –13/5

Step-by-step explanation:

25x² – 169 = 0

Using quadratic formula:

Let a=25, b=0 and c=–169

Recall,

–b ± (√b²–4ac)/2a

–0 ± (√0²–4(25)(–169))/2(25)

–0 ± (√0 + 16900)/50

(–0 ± 130)/50

x = (– 0 + 130)/50 or (–0–130)/50

x = 13/5 or –13/5

You might be interested in

Which equation represents the proportional relationship in the table ?

den301095 [7]

C=3r

hope this helps!

3 0

3 years ago

Read 2 more answers

An exponential function has a starting value of 13 and a growth rate of 0.78%. Write an equation to model the situation.

Elina [12.6K]

Answer:

The equation that models the situation is $A(t) = 13(1.0078)^t$

Step-by-step explanation:

Exponential equation:

An exponential equation has the following format:

$A(t) = A(0)(1+r)^t$

In which A(0) is the starting value and r is the growth rate, as a decimal.

Starting value of 13 and a growth rate of 0.78%.

This means that $A(0) = 13, r = 0.0078$

Write an equation to model the situation.

$A(t) = A(0)(1+r)^t$

$A(t) = 13(1+0.0078)^t$

$A(t) = 13(1.0078)^t$

The equation that models the situation is $A(t) = 13(1.0078)^t$

4 0

3 years ago

I will mark brainlest if its right <br>14 over 9 divided by 14 over 9

Afina-wow [57]

The answer to this math equation is 1 whole. When dividing two equivalent fractions, the answer will always be 1.

6 0

4 years ago

A company produces optical-fiber cable with a mean of 0.6 flaws per 100 feet. What is the probability that there will be exactly

Mars2501 [29]

Answer:

$P(X = 4) =0.133$

Step-by-step explanation:

From the question we are told that:

Mean $\x=0.6/100$

Flaws $f=4$

Distance $d_2=1000ft$

Generally the equation for Poisson mean lambda over 1000 is mathematically given by

$\lambda=0.6*1000/100$

$\lambda = 6$

Therefore

$P(X = 4) = {e^-\lambda * \lambda^{\=x}} {{\=x}!}$

$P(X = 4) =\frac{ e^{-6} * 6^4}{ 4!}$

$P(X = 4) =0.133$

4 0

3 years ago

What is 4/9 times 1/8

Marysya12 [62]

4/9 times 1/8 is 0.055

5 0

3 years ago

Read 2 more answers