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3 years ago

What equation represents this sentence?

Mathematics

2 answers:

geniusboy [140]3 years ago

5 0

- BRAINLIEST answerer

stepan [7]3 years ago

3 0

Answer:

n - 7 = 16

Step-by-step explanation:

as it says "7 less than a number". If it was "a number less than 7" then it would be the 3rd one.

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Michele correctly solved a quadratic equation using the quadratic formula as shown below.

Fofino [41]

Answer:

The original equation must have been:

$7x^{2} -5x-2=0$

Step-by-step explanation:

A quadratic equation is in the form of :

$ax^{2} +bx+c=0$

And it is solved in the form of :

$x=\frac{-b+\sqrt{b^{-4ac} } }{2a}$ and $x=\frac{-b-\sqrt{b^{-4ac} } }{2a}$

Now the given equation is :

$x=\frac{-(-5)+-\sqrt{(-5)^{2} -4(7)(-2)} }{2(7)}$

We can see that here;

a = 7

b = -5

c = -2

So, the original equation must have been:

$7x^{2} -5x-2=0$

5 0

3 years ago

9 hundred equals how many tens

user100 [1]

Answer:

90 tens

Step-by-step explanation:

We know that there are 10 tens in a hundred, so this will be our unit rate for the rest of this problem. Since we have 9 hundreds, we have to multiply by 10 to get our answer.

9 × 10 = 90

The answer to our question is 90 tens are in 9 hundreds.

3 0

3 years ago

What is the factorization of the polynomial below? 9x2 - 16

Agata [3.3K]

use (a-b) (a+b )

(3x+4) (3x- 4)

8 0

3 years ago

Read 2 more answers

Consider a 15-year mortgage at an interest rate of 8% compounded monthly. The amount to be mortgaged is $130,000. After the firs

MrMuchimi

The answer is $129,624.32

3 0

3 years ago

Find f^-1(x) and it’s domain.

Mrac [35]

Answer: A

Step-by-step explanation:

Letting $f(y)=x$ ,

$x=\sqrt{y}-5\\\\x+5=\sqrt{y}\\\\y=(x+5)^{2}$

Also, the domain of an inverse is the same as the range of the original function, so the range is $x \geq 0$

7 0

2 years ago