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4 years ago

Look at the way that Shira answered the question above.

Mathematics

2 answers:

guapka [62]4 years ago

4 0

Answer:

x = 8

Step-by-step explanation:

Her mistake was subtracting 2 on both sides. Instead she should've added 2 on both sides.Getting a result of 2x=16. Then you divide 2 on both sides to get x = 8.

tamaranim1 [39]4 years ago

3 0

Answer:

x=8

Step-by-step explanation:

A.So she made a mistake by not looking at the minus sign and subtracted when she should've added.

B. How to solve it is you add 2 so 2x-2=14 +2 both sides so 2x=16 divded by 2 and you get x=8

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Find the 100th term in the sequence f(n)=8n+2

tia_tia [17]

Answer:

802

Step-by-step explanation:

7 0

3 years ago

Three-sevenths of a number is 21. Find the number.

amm1812

Answer: 49

Step-by-step explanation:

HI :)

A confusing question but here's how I got my answer

1/7 is 21 divided by 3, which is 7

So now that we know what one seventh is we can multiply 7 by 7 and we get 49

Hope this helped :)

5 0

3 years ago

Find two positive even consecutive integers such that the square of the smaller integer is 10 more than the larger integer

mafiozo [28]

Answer:

the numbers are $4,6$

Step-by-step explanation:

Let

x-------> the smaller even consecutive integer

x+2-------> the larger even consecutive integer

we know that

$x^{2}=(x+2)+10$

solve for x

$x^{2}-x-12=0$

The formula to solve a quadratic equation of the form $ax^{2} +bx+c=0$ is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}-x-12=0$

$a=1\\b=-1\\c=-12$

substitute in the formula

$x=\frac{1(+/-)\sqrt{-1^{2}-4(1)(-12)}} {2(1)}$

$x=\frac{1(+/-)\sqrt{49}} {2}$

$x=\frac{1(+/-)7} {2}$

$x=\frac{1(+)7} {2}=4$ ------> the solution (must be positive)

$x=\frac{1(-)7} {2}=-3$

therefore

the numbers are $4,6$

5 0

3 years ago

Anyone? please help asap i really want to finish this

Nesterboy [21]

Answer:

Question 3: $b \geq 2$

Question 4: $r < -5$

Question 5: $y \leq -6$

Step-by-step explanation:

Question 3:

$b + 2 \geq 4\\b + 2 -2 \geq 4 - 2\\b \geq 2\\$

Question 4:

$13 > 18 + r\\13 - 18 > 18 -18 + r\\\\-5 > r\\ r < -5$ sign flips when r switches sides

Question 5:

$3y \leq 2y - 6\\3y - 2y \leq 2y - 2y - 6\\\\y \leq - 6\\$

8 0

2 years ago

The equilateral triangles shown below are similar.

Drupady [299]

Answer:

Below in bold.

Step-by-step explanation:

The smaller one has side 2 and the corresponding side on the larger one is 5, so the answer is 2/5.

The individual sides and perimeter are one-dimensional, so:

The ratio of their perimeters is the same 2/5.

The ratio of their areas ( which is 2 dimensional) is 2^2/5^2 = 4/25.

4 0

2 years ago