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3 years ago

9

-7a-3<2a Please solve

2 answers:

Alex_Xolod [135]3 years ago

6 0

Answer:

2A or II-A may refer to: Alberta Highway 2A · Alpha-2A adrenergic receptor · Keratin 2A · Massachusetts Route 2A · Stalag II-A · Telecom 2A, a satellite

Step-by-step explanation:

i think this is it or wht you talking about

rusak2 [61]3 years ago

4 0

Answer:

a>-1/3

Step-by-step explanation:

-7a-2a<3

-9a<3

-a<3/9

a>-3/9

a>-1/3

You switch the sign because your dividing by a negative.

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Update for the first one

PSYCHO15rus [73]

Answer:

y = x + 2.5

Step-by-step explanation:

slope = (y2-y1)/(x2-x1) where the variables indicate the coordinates of the two points

slope = (2.5-1.5)/(0+1) = 1

equation = y-y1 = m(x-x1)

y - 2.5 = x

y = x + 2.5

7 0

3 years ago

Read 2 more answers

Question 4 (3 points)

trapecia [35]

The sum of the angles in a triangle is 180°, If I remember correctly.

7 0

3 years ago

1. Find the sum of the series (IMAGE) . Show your work.

pav-90 [236]

<u>QUESTION 1 ANSWER</u>

The series is

$\sum_{n=1}^{15}{ (2n-1)}$

So the nth term of this sequence is

$U_n=2n-1$

We generate some few terms of the sequence as follows:

When $n=1$ ,

The first term of the sequence becomes,

$U_1=2(1)-1$

$U_1=1$

When $n=2$ ,

$U_2=2(2)-1$

$U_2=3$

When $n=3$ ,

$U_2=2(3)-1$

$U_2=5$

The constant difference is $d=2$ .

The sum of the series is given by,

$S_n=\frac{n}{2}(2a+(n-1)d)$

There are 15 terms in the series, therefore $n=15$

$S_{15}=\frac{15}{2}(2(1)+(15-1)2)$

$S_{15}=\frac{15}{2}(2+14(2))$

$S_{15}=\frac{15}{2}(30)$

$S_{15}=15\times 15$

$S_{15}=225$

<u>ANSWER TO QUESTION 2</u>

The bottom row has $23$ boxes. This means $a=U_1=23$

a) Since each row has 3 fewer boxes $d=-3$ .

The nth row is given by,

$U_n=23+(n-1)\times(-3)$

$U_n=23+-3n+3$

$U_n=23-3n$

The top row is the 6th row, meaning $n=6$ .

$U_6=23-3(6)$

$U_6=23-18$

$U_6=5$

b) The number of boxes in the entire display is given by

$S_n=\frac{n}{2} (a+l)$

Where $a=23$ , the first term(row) and $l=5$ , the last term(row).

Since there are 6 rows,

$S_6=\frac{6}{2} (23+5)$

$S_6=3 (28)$

$S_6=84$

<u>ANSWER TO QUESTION 3</u>

The number of visitors in the first week is $a=5$ .

Since the number of visitors each week is doubled the number of visitors in the subsequent weeks, the sequence is a geometric progression with a common ratio of $r=2$ .

The general term of a geometric sequence is

$U_n=ar^{n-1}$

So in the 8th week, we have

$U_8=5\times 2^{8-1}$

$U_8=5\times 2^{7}$

$U_8=5\times 128$

$U_8=640$

Hence 640 people visited the website in the 8th week

4 0

3 years ago

you are given a fraction in the simplest form. The numerator is not zero. When you write the fraction as a decimal, it is a repe

Tems11 [23]

Answer:

Step-by-step explanation:Let - be a fraction in simplest form, b # 0, written

as a repeating decimal when in decimal form.

Since the only numbers which can be factors of the

denominators lead to a terminating decimal are 1, 2

and 5 (including rising to powers) and combinations

of them, it means that if the denominator has at

least one of the other numbers at the denominator,

the decimal form will be a repeating decimal.

Among the numbers from 1 to 10, the presence of

any of these numbers in the denominator will lead

to a repeating decimal:

3 0

3 years ago

a restaurant sold eight times as many salads as they sold steaks.if they sold four steaks, how many salads did they sell in all

garri49 [273]

They sold 32 salads.

3 0

3 years ago

Read 2 more answers