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2 years ago

-3x + 6 - (-5) + 7x Simplify it

Mathematics

2 answers:

Vadim26 [7]2 years ago

7 0

3x+6-[-5]+7x

=3x+6+5+7x

= 3x+7x=6+5

=10x=11

=x=11/10

SO,

x=11/10

Anna11 [10]2 years ago

5 0

Answer:

4x+11

Step-by-step explanation:

-3x+7x +6+5

4x+11

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Tutor O-Rama claims that their services will raise student SAT math scores at least 50 points. The average score on the math por

Novosadov [1.4K]

Answer:

See below

Step-by-step explanation:

The score increase was 35 points. They claimed an increase of at least 50 points. For a significance level of 5%, the z-score for the situation needs to be at smaller than -1.645. For a significance level of 1%, the z-score needs to be smaller than -2.325

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3 years ago

HELP PLEASE!!

Marizza181 [45]

Answer: (2.5, 5)

Step-by-step explanation:

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3 years ago

Read 2 more answers

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anzhelika [568]

Slope = 2/5 ; Passes through (-4, -7) ; Point-slope form

point-slope form : y-y₁=m(x-x₁)

Simply plug everything in :)

Remember !! m=slope

y - (-7) = 2/3(x - (-4))

Simplify.

y + 7 = 2/3(x + 4)

*Some teachers want this simplified more so here's the simplest answer :

y + 7 = 2/3x + 8/3 *

~Hope I helped!~

3 0

3 years ago

Solve each linear-quadratic system algebraically. Show all work.

a_sh-v [17]

Answer:

(5, - 8 ) and (- 1, 4 )

Step-by-step explanation:

Given the 2 equations

y = - x² + 2x + 7 → (1)

y = - 2x + 2 → (2)

Substitute y = - 2x + 2 into (1)

- 2x + 2 = - x² + 2x + 7 ← subtract - x² + 2x + 7 from both sides

x² - 4x - 5 = 0 ← in standard form

(x - 5)(x + 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 5 = 0 ⇒ x = 5

x + 1 = 0 ⇒ x = - 1

Substitute these values into (2) for corresponding values of y

x = 5 → y = - 2(5) + 2 = - 10 + 2 = - 8 ⇒ (5, - 8)

x = - 1 → y = - 2(- 1) + 2 = 2 + 2 = 4 ⇒ (- 1, 4)

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3 years ago

In order to develop a more appealing cheeseburger, a franchise uses taste tests with 12 different buns, 7 different cheeses,

Readme [11.4K]

Answer:

It will take a week to taste all the cheeseburgers possible.

Step-by-step explanation:

Given:

Number of buns of different types = 12

Number of cheeses of different types = 7

Number of lettuce of different types = 4

Number of tomatoes of different types = 3

Time taken to eat one cheeseburger = 10 minutes

To find:

Total time taken to eat all the possible cheeseburgers = ?

Solution:

First of all, we need to find out what all possible number of cheeseburgers can be made using the given number of ingredients.

Total number of possible ways to make cheeseburgers = Number of choices of buns $\times$ Number of choices of cheeses $\times$ Number of choices of Lettuces $\times$ Number of choices of tomatoes

And this number of choices are nothing but the number of types of ingredients available.

So, total number of cheeseburgers possible = 12 $\times$ 7 $\times$ 4 $\times$ 3 = 1008

Time taken to eat 1 cheeseburger = 10 minutes

Time taken to eat 1008 cheeseburger = 10 $\times$ 1008 = 10080 minutes = 168 hours = 7 days

i.e. It will take a week to taste all the cheeseburgers possible.

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3 years ago