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3 years ago

20 brainly pointss!!!

Mathematics

2 answers:

slamgirl [31]3 years ago

7 0

Answer:

dang it i just had the answer

Step-by-step explanation:

Lerok [7]3 years ago

3 0

Answer:

A and B

Step-by-step explanation:

we have:

A: 2x-3y=6

-3y=-2x+6

3y=2x-6

y=2x-6/3

y=2/3x-2

so the slope here is 2/3

B: 3x-2y=-9

-2y=-3x-9

2y=3x+9

y=3/2x+9/2

so the slope here is 3/2

in C the slope is -32 and in D it's 23

perpendicular lines can be known using the rule:

slope (first line)=-1/slope (second line)

2/3= -1 over 3/2

so A and B are the two perpendicular lines

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The store price of a jeans is $50. If the discount given by the store is 45%, calculate the discount amount offered by the store

nata0808 [166]

Step-by-step explanation:

50+45%=72.5

50-45%=27.5

50×45%=22.5

7 0

3 years ago

Read 2 more answers

Can anyone Help me pleasee ?

3241004551 [841]

Answer:

First one

Step-by-step explanation:

.20 is 20% of 100 and there is 5 boxes and 5 times 20 = 100

6 0

3 years ago

Evaluate the expression for the given values.

blagie [28]

we have given an expression $mx-y$ .

we have given the value of x,y and m .

$m=5,x=3,y=8$ .

we need to find the value of expression mx-y.

we need to plug the respective values and solve.

$mx-y=(5)*(3)-(8)=15-8=7.$ .

7 is the value of expression mx-y.

3 0

3 years ago

Nuts.com sells raw almonds for $10 per pound and roasted pistachios for $12 per pound. Christopher spends $70, before taxes and

sp2606 [1]

Christopher purchased 2.8 pounds of almonds and 3.5 pounds to roasted pistachios.

Step-by-step explanation:

Cost of almonds per pound = $10

Cost of roasted pistachios = $12

Total amount spent = $70

Weight of nuts = 6.3

Let,

Weight of almonds = x

Weight of roasted pistachios = y

According to given statement;

x+y=6.3 Eqn 1

10x+12y=70 Eqn 2

Multiplying Eqn 1 by 10

$10(x+y=6.3)\\10+10y=63\ \ \ Eqn\ 3$

Subtracting Eqn 3 from Eqn 2;

$(10x+12y)-(10x+10y)=70-63\\10x+12y-10x-10y=7\\2y=7$

Dividing both sides by 2

$\frac{2y}{2}=\frac{7}{2}\\y=3.5$

Putting y=3.5 in Eqn 1

$x+3.5=6.3\\x=6.3-3.5\\x=2.8$

Christopher purchased 2.8 pounds of almonds and 3.5 pounds to roasted pistachios.

Keywords: linear equations, elimination method

Learn more about elimination method at:

#LearnwithBrainly

8 0

3 years ago

Which of the expressions below can be factored using the difference of squares method?

zlopas [31]

Answer:

The second choice is correct. It can be factored as:

$9x^2-16y^2=(3x-4y)(3x+4y)$

Step-by-step explanation:

The Difference of Squares Method for Factoring

The expression:

$a^2-b^2=(a-b)(a+b)$

Is a widely used method to factor binomials that are expressed as the subtraction of two perfect squares.

The condition for a binomial to be factored by using this method is that both terms must have an exact square root and they must be subtracted.

The last two choices are not valid because they are not a subtraction but an addition.

The first choice is not valid because none of the terms is a perfect square.

The second choice is correct. It can be factored as:

$9x^2-16y^2=(3x-4y)(3x+4y)$

4 0

3 years ago