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3 years ago

What does -4x+7=11 equal ?

Mathematics

2 answers:

viktelen [127]3 years ago

6 0

-7 to make 4 so -4x=4 x=-1

The answer is x=-1

Hope this helps:)

katrin [286]3 years ago

3 0

Answer:

x = -1

Step-by-step explanation:

Well we know the equation -4x + 7 = 11

To solve this we will first subtract 7 from both sides

-4x + 7 = 11

-4x = 4

Next, we will divide both sides by the coefficient, -4, to isolate the variable, x

-4x = 4

x = -1

This will result in our answer of x = -1

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A pair of jeans was 30% off the original price. The sale resulted in a $24 discount.

Natalija [7]

Answer:

Step-by-step explanation:

We must consider the price of the Jeans as whole since it represents the full price of the jeans. The discount might be a limited only offer and does not represent the fullest price of the jeans.

To find the original price of the jeans we have two methods that in the end are going to lead to the same conclusion. The long method is to represent mathematically the information presented. Conceptually, we could interpret the statement saying that the original price minus 30% of the original price is equal to the original price minus the discount. Let us say the Original Price (OP)=x. then, mathematically we represent the statement as:

$x -0,3*x = x -24$

What we need to do now is to isolate x on one side of the equation. We have x as a common factor, so:

$x*(1-0,3)=x-24 \rightarrow 24+x*0,7=x$

$24=x-0,7*x \rightarrow 24 = x*(1-0,7)$

$24 = 0,3*x \rightarrow 24/0,3 =x \rightarrow x=80$

This one is the original price of the jeans: $80. There is a shortcut to this method, though. We know two things that are fundamental: the discount sale is $24 and the jeans are 30% off. These statements provide the same information; thus we can match them and say that:

$24 = 0,3*x \rightarrow 24/0,3 =x \rightarrow x=80$

And we find ourselves on the same conclusion.

Have a wonderful day :D

8 0

3 years ago

a quadratic equation has zero real number solutions. which could be the discriminant value associated with this equation? a. –5

Flauer [41]

Answer: Option 'a' is correct.

Step-by-step explanation:

As we know about the discriminant value i.e.

if we have given a quadratic equation :

$ax^2+bx+c=0$

then,

discriminant value will be

$b^2-4ac$

There are 3 properties regarding discriminant value as follows:

$1)b^2-4ac>0\\\\means,\\\\\text{ there exists real zeros}\\\\2)b^2-4ac=0\\\\means,\\\\\text{ there exists equal zeroes}\\\\3)b^2-4ac$

So, here we need a zero real number solutions i.e. there does not exists any real number.

So,

$b^2-4ac=-5$

Hence, Option'a' is correct.

5 0

4 years ago

Read 2 more answers

Gas mileage is the number of miles you can drive on a gallon of gasoline. A test of a new car result is 380 miles on 20 gallons

SOVA2 [1]

380/20 = 19

The car can go 19 miles on 1 gallon of gas.

75 * 19 = 1,425

You can drive 1,425 miles on 75 gallons.

6 0

3 years ago

Find the area of the figure to the nearest square unit.

alex41 [277]

Answer:

357 mi²

Step-by-step explanation:

The shape is made of a triangle and a half-square

we will calculate the area of each one

The half square:

let A1 be the area of the half-circle:

A1= (10²*π)/2 = 50π mi²

The rectangle:

Let A2 be the area of the triangle:

A2= 10*20=200 mi²

The whole shape:

let At be the total area:

At =A1+A2= 200+50π =357.07≈ 357 mi²

4 0

3 years ago

Will give Brainliest

MaRussiya [10]

Answer:

y-intercept is 2 .

Step-by-step explanation:

Combine 14 1 4 and x x . Rewrite in slope-intercept form. Using the slope-intercept form, the y-intercept is 2 .

5 0

3 years ago