MATHEMATICS HIGH SCHOOL

The phone you want to purchase is $200. You have a coupon for 30% off the purchase price. How much will you pay for the phone after the discount?

Answers

Answer 1

Answer:

Answer:

$140

Step-by-step explanation:

Orignal Price: $200

200 x 0.3

= 60

200 - 60

= 140

Answer 2

Answer:

Answer:the phone will cost 140

Step-by-step explanation:

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Solve by graphing. x2 + 2x – 3 = 0

Answers

The graph of an equation is the set of all points that are solutions of the equation. Frequently, a relationship between two quantities can be expressed as an equation in two variables. For instance, we can write the equation of our problem as the following form:

$y=x^2+2x-3 \n \n Or: \n \n f(x)=x^2+2x-3$

So, by graphing $f(x)$ we want to know the x-intercepts. This graph is illustrated in the Figure below. As you can see, points in red are the solution to this problem that are the x-intercepts of our previously defined function $f(x)$ . These points are:

$(-3,0) \ and \ (1,0)$

The solutions of the given quadratic equation are x=-3 and x=1.

The given quadratic equation is x²+2x-3=0.

By using splitting middle term method, the given equation can be solved as follows:

Here, x²+3x-x-3=0

x(x+3)-1(x+3)=0

(x+3)(x-1)=0

x+3=0 and x-1=0

x=-3 and x=1

Therefore, the solutions of the given quadratic equation are x=-3 and x=1.

To learn more about the solution of quadratic equation visit:

brainly.com/question/18305483.

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Please answer correctly !!!!!!!! Will mark brianliest !!!!!!!!!!!

Answers

Answer:

x=6

Step-by-step explanation:

h(x) = -( x-2)^2 +16

We want when h(x) = 0

0 = -( x-2)^2 +16

Subtract 16 from each side

-16 = -( x-2)^2 +16-16

-16 = -( x-2)^2

Divide by -1

16= ( x-2)^2

Take the square root of each side

±sqrt(16) = sqrt(( x-2)^2 )

±4 = x-2

Add 2 to each sdie

2 ±4 = x-2+2

2+4 = x 2-4 =x

6 =x -2 =x

since time cannot be negative

x=6

Write a story that can be represented by the following equation: x + 16 = 42

Answers

Answer:

Amanda bought 42 apples and gave 16 away how many are left.

Step-by-step explanation:

X=26

Answer:

Renee runs a dogwalking business. She walked 42 dogs over the weekend. On Saturday she walked 16 dogs but Renee can't remember how many she walked on Sunday. Write and equation to find how many dogs Renee walked on Sunday where x is the number of dogs she walked on Sunday.

Simplify: 9(a + b) + 4(3a + 2b)A) 13a 13b
B) 21a + 17b
Eliminate
C) 21a + 2b
D) 38ab

Answers

Answer:

Option (B) is correct.

The simplified form of the given expression $9\left(a\:+\:b\right)\:+\:4\left(3a\:+\:2b\right)$ is $21a+17b$

Step-by-step explanation:

Given: expression $9\left(a\:+\:b\right)\:+\:4\left(3a\:+\:2b\right)$

We have to simplify the given expression $9\left(a\:+\:b\right)\:+\:4\left(3a\:+\:2b\right)$ and choose the correct option from given options.

Consider the given expression $9\left(a\:+\:b\right)\:+\:4\left(3a\:+\:2b\right)$

Apply distributive rule, $a\left(b+c\right)=ab+ac$

We have,

$=9a+9b+12a+8b$

Adding like terms,

LIKE TERMS are terms having same variable with same degree.

$9a+12a=21a\n\n \:9b+8b=17b$

We have,

$=21a+17b$

Thus, The simplified form of the given expression $9\left(a\:+\:b\right)\:+\:4\left(3a\:+\:2b\right)$ is $21a+17b$

b) 9(a+b)+4 (3a+2b)=21a+17b

Himpunan penyelesaian dari pertidaksamaan | 2x + 1| ≤ 3 adalah.....a. { -1 ≤ x ≤3 }
b. { -2 ≤ x ≤ 2}
c. { -2 ≤ x ≤ 1 }
d. { -1 ≤ x ≤ 1 }
e. { 0 ≤ x ≤ 1 }
Tolong caranya...

Answers

$| 2x + 1| \leq3 \n2x+1\leq3\wedge2x+1\geq-3\n2x\leq2 \wedge 2x\geq-4\nx\leq1 \wedge x\geq-2\n-2\leq x \leq1 \Rightarrow C$

Final answer:

The solution to the given inequality, |2x + 1| ≤ 3, is the set { -2 ≤ x ≤ 1 }, which corresponds to answer choice (c). This is achieved by solving two separate inequalities, 2x + 1 ≤ 3 and - (2x + 1) ≤ 3.

Explanation:

The subject of the question is Mathematics, specifically a High School algebra topic on solving absolute inequalities. The student's question is asking us to solve the inequality |2x + 1| ≤ 3. To do this, we need to create and solve two separate inequalities: 2x + 1 ≤ 3 and - (2x + 1) ≤ 3.

Solving 2x + 1 ≤ 3 gives us 2x ≤ 2 and x ≤ 1 . Solving - (2x + 1) ≤ 3 gives us -2x - 1 ≤ 3 , then -2x ≤ 4 , and finally x ≥ -2 . Combining these answers gives us the solution set { -2 ≤ x ≤ 1 }, which corresponds to answer choice (c).