All categories

3 years ago

How do you solve this equation 7(3)+(-9)×(-4)=

Mathematics

1 answer:

Softa [21]3 years ago

7 0

Hello!

To solve this equation, we will need to use PEMDAS (parentheses, then exponents, then multiplication/division, then addition/subtraction).

7(3) + (-9) x (-4) =

21 + (-9) x (-4) =

21 + 36 =

I hope this helps you! Have a lovely day!

- Mal

You might be interested in

Which is the equation of a line that has a slope of 4 and passes through point (1, 6)?

natima [27]

Answer:2

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

What is the solution to the system of equations y = -4x - 19 and y = 2x - 1 in (a, b) form

Temka [501]

For this system of equation I used substitution:

Step 1: Every time you see a y in the equation y = 2x - 1 replace it with -4x - 19

-4x - 19 = 2x - 1

Step 2: Isolate x

(-4x + 4x) - 19 = (2x + 4x) - 1

-19 = 6x - 1

-19 + 1 = 6x + (- 1 + 1)

-18 = 6x

x = -3

Step 3: To solve for y replace x in the equation y = 2x - 1 with -3

y = 2(-3) - 1

y = -6 - 1

y = -7

(-3, -7)

Check:

-7 = -4(-3) - 19

-7 = 12 - 19

-7 = -7 --------------------------------> Correct!

-7 = 2(-3) - 1

-7 = -6 - 1

-7 = -7 --------------------------------> Correct!

Hope this helped!

5 0

3 years ago

What is the exact solution

nadezda [96]

Answer:

$\displaystyle{x = \dfrac{\ln 5+6 \ln 10}{2\ln 10} }$

Step-by-step explanation:

We are given the exponential equation of:

$\displaystyle{10^{2x-6} = 5}$

Take natural logarithm both sides:

$\displaystyle{\ln \left(10^{2x-6}\right) = \ln 5}$

Apply logarithm property where:

$\displaystyle{\ln M^N = N\ln M}$

Therefore:

$\displaystyle{(2x-6)\ln 10 = \ln 5}$

Divide both sides by $\displaystyle{\ln 10}$ :

$\displaystyle{\dfrac{(2x-6)\ln 10}{\ln 10} = \dfrac{\ln 5}{\ln 10}}\\\\\displaystyle{2x-6 = \dfrac{\ln 5}{\ln 10}}$

Add 6 both sides:

$\displaystyle{2x-6+6 = \dfrac{\ln 5}{\ln 10}+6}\\\\\displaystyle{2x = \dfrac{\ln 5}{\ln 10}+6}$

Then divide both sides by 2:

$\displaystyle{\dfrac{2x}{2} = \dfrac{\dfrac{\ln 5}{\ln 10}+6}{2}}\\\\\displaystyle{x = \dfrac{\ln 5}{2\ln 10} + 3}$

Multiply 3 by 2ln10 for both denominator (1) and numerator (3):

$\displaystyle{x = \dfrac{\ln 5}{2\ln 10} + \dfrac{3 \cdot 2\ln 10}{1 \cdot 2\ln 10}}\\\\\displaystyle{x = \dfrac{\ln 5}{2\ln 10} + \dfrac{6\ln 10}{ 2\ln 10}}$

Add in one denominator:

$\displaystyle{x = \dfrac{\ln 5+6 \ln 10}{2\ln 10} }$

Hence, the answer is first choice.

7 0

1 year ago

Read 2 more answers

Alexis is on her freshman volleyball team. She makes 27% of her foul shots, leading her team to 15 wins in 19 games for the seas

SSSSS [86.1K]

You need to filter out the necessary information. You are told that Alexis makes 27% of her foul shots. You are told she took 24 in the season. The info about 15 wins and 19 games is superflous information.

Find 27% of 24 foul shots to get to the answer.

Do this by multiplying 24 by .27.

6.48 - we are told to round the number to the nearest tenth.

6.5 shots - letter B.

5 0

3 years ago

HELP ME PLEASE!!!!!!!!!!!!

umka21 [38]

Answer:

28.

Step-by-step explanation:

The first five prime numbers are : 2,3,5,7 and 11. Their sum is : 2+ 3 + 5 + 7 +11 = 28

8 0

3 years ago