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Mekhanik [1.2K]
3 years ago
8

-7x2y=-13 x-2y=11 Slove useing subtract

Mathematics
1 answer:
babunello [35]3 years ago
7 0
-7x+2y=-13
x-2y=11
add them euations

-7x+2y=-13
<u>1x-2y=11 +</u>
-6x+0y=-2

-6x=-2
divide both sides by -6
x=1/3

sub back
x-2y=11
1/3-2y=11
minus 1/3 both sides
-2y=10 and 2/3
divide both sides by -2 (or times both sides by -1/2)
y=-5 and 1/3



x=1/3
y=-5 and 1/3
(1/3,-16/3)
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Can someone pls help me and explain
icang [17]
The floor tile is made up of 5 pieces of 2 inches by 2 inches square.

Area of 1 square = 2 x 2 = 4 in²

Area of 5 square = 4 x 5 = 20 in²

Volume of the floor tile = 20 x 3/4 = 15 in³

------------------------------------------
Answer: 15 in³ (Answer G)
------------------------------------------

5 0
3 years ago
How can I solve this?<br>Please use the simplest format​
IgorLugansk [536]

Answer:

option D is true.

Step-by-step explanation:

The right-angled triangle is shown.

From the right-angled triangle,

The angle Ф = 60°

We know that the trigonometric ratio

tan Ф = opposite / adjacent

  • opposite = 4
  • adjacent = n

Thus,

tan 60 = 4 / n

√3 = 4/n

n = 4/√3

Thus,

n = 4/√3

  = (4 × √3) / (√3 × √3)

  = 4√3 / 3

Thus,

n  = 4√3 / 3

Using Pythagorean theorem

m = √n²+4²

m=\sqrt{\left(4\cdot \frac{\sqrt{3}}{3}\right)^2+4^2}

m=\sqrt{\frac{4^2}{3}+4^2}

m=\sqrt{\frac{64}{3}}

m=\frac{8}{\sqrt{3}}

m=\frac{8\sqrt{3}}{3}

Thus,

  • m=\frac{8\sqrt{3}}{3}
  • n  = 4√3 / 3

Therefore, option D is true.

3 0
3 years ago
3x-8(2x+3)= -6(2x+5)
faust18 [17]
3x-16x-24=-12x-30
-13x+12x=-30+24
-x=-6   /*(-1)
x=6
7 0
3 years ago
Read 2 more answers
Figure ABCD is a parallelogram. What is the value of x? A B O 6 ET O 7 8 5x + 3 38 09 D С​
kondor19780726 [428]

Answer:

Given: It is given that  and .

To Prove: ABCD is a parallelogram.

Statements                                                                            

1.  and            

Reason: Given                                      

2.  are alternate interior angles      

Reason: Def of alternate interior angles

3.                                                

Reason: Alternate interior angles are congruent

4.                                                              

Reason: Reflexive property

5.                                                  

Reason: SAS congruency theorem

6.                                                        

Reason: Corresponding Parts of Congruent triangles are Congruent (CPCTC)

7. ABCD is a parallelogram                                  

Reason: Parallelogram Side Theorem

Step-by-step explanation:

please mark me brainliest

6 0
2 years ago
Miss Wilson has spent $6 on breakfast using her debit card 5 mornings per week for the past 8 weeks. What is the change in Miss
Lera25 [3.4K]

Answer:

(6x5) • 8

Step-by-step explanation:

We’ll I find it’s 6 dollars a day and their are 5 days that would be 30 but this went in for 8 weeks so it would be 30 x 8 which equal 240

8 0
3 years ago
Read 2 more answers
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