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4 years ago

Sinplify : -(-x+1) 1 : -x-1 2: x-1 3: -x+1 4: x+1

Mathematics

1 answer:

Ray Of Light [21]4 years ago

7 0

Answer- 2: x-1

When there is a " - " in front of the parenthesis change the sign of each term in parentheses

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What is the surface area of the square pyramid represented by the net?

jeyben [28]

The surface area is 252 m

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3 years ago

You bike 1 mile the first day of your training, 1.3 miles the second day, 1.9 miles the third day, and 3.1 miles the fourth d

JulsSmile [24]

Answer:

19.9 miles

Step-by-step explanation:

In this problem we have:

$d_1=1 mi$ is the distance travelled during the 1st day

$d_2=1.3 mi$ is the distance travelled during the 2nd day

$d_3=1.9 mi$ is the distance travelled during the 3rd day

$d_4=3.1 mi$ is the distance travelled during the 4th day

We notice that the difference between the distance travelled on the (n+1)-th day and the distance travelled on the n-th day doubles every day. In fact:

$d_2-d_1=0.3\\d_3-d_2=2\cdot 0.3 = 0.6\\d_4-d_3=2\cdot 0.6 = 1.2$

Which can be rewritten using the general formula:

$d_{n+1}-d_n=2(d_n-d_{n-1})$

This means that

$d_{n+1}=d_n+2(d_n-d_{n-1})$

By applying this formula recursively, we can find the 7th term, which is the distance travelled on the 7th day:

$d_1=1\\d_2=1.3\\d_3=1.9\\d_4=3.1\\d_5=3.1+2\cdot 1.2=5.5\\d_6=5.5+2\cdot 2.4=10.3\\d_7=10.3+2\cdot 4.8=19.9 mi$

So, the distance travelled on the 7th day is 19.9 miles.

7 0

4 years ago

If one factor of x2 + 2x - 24 is (x+6), what is the other factor?

Anni [7]

Answer:

(x - 4)

Step-by-step explanation:

Given

x² + 2x - 24

Consider the factors of the constant term (- 24) which sum to give the coefficient of the x- term (+ 2)

The factors are + 6 and - 4, since

6 × - 4 = - 24 and 6 - 4 = + 2, thus

x² + 2x - 24 = (x + 6)(x - 4) ← in factored form

Thus the other factor is (x - 4)

4 0

3 years ago

Can you guys help with my math this is a huge grade as well :D

Softa [21]

answer

A .

Step-by-step explanation:

why cause she flipped it once than three more times and a shows four and 3 +1 = 4

7 0

3 years ago

Read 2 more answers

Solve the inequality -2x - 8<4

wariber [46]

The answer is X > - 6

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3 years ago