3 years ago

if 7 is added to the square of and integer, the result is 2 less than 10 times that integer. find the integer

Mathematics

1 answer:

Llana [10]3 years ago

6 0

Answer:

The integer is 1 or 9.

Step-by-step explanation:

Let the integer be x, then:

x^2 + 7 = 10x - 2

x^2 - 10x + 9 = 0

(x - 9)(x - 1) = 0

x = 1, 9.

Verifying

9^2 + 7 = 88

10*9 - 2 = 88 So 9 is correct.

1^2 + 7 = 8

10*1 - 2 = 8 So 1 is also correct.

You might be interested in

Find 1 3/5 + 1 1/3 iready

Arisa [49]

20 plus 24
Divided by 15
Which gets you to
44 over 15 or 2 wholes and 14 over 15

5 0

3 years ago

Read 2 more answers

Can someone help me pleaseeee

sladkih [1.3K]

It’s 189.0405904059041

7 0

3 years ago

Read 2 more answers

Complete the equivalent fraction equation below. Blank over two equals two over blank equals blank over eight

podryga [215]

1 over 2 equals 2 over 4 equals 4 over 8.
Hope this helps! :)

5 0

4 years ago

A rectangle has an area of 72 swaure units. The width of the rectangle is 9 units. The length of the rectangle is 2x + 4. What i

vichka [17]

Answer:

8 units

Step-by-step explanation:

Area of a rectangle = Width multiplied by Length

Substitute in all the known numbers into this formula to get

72 = (9) × $(2x+4)$

Solve the equation for x, to find out the length

$9(2x+4)=72$

$2x+4=72/9$

$2x+4=8$

$2x=8-4$

$2x=4$

$x=4/2$

$x=2$

Length of the rectangle = $(2x+4)$

$2(2)+4$

$4+4=8$

5 0

3 years ago

2) Cereal cost $7 / box. How many boxes did Huong buy if she spent $21?

uysha [10]

Answer:3 boxes.
Explanation: $21 / $7=3 boxes

3 0

3 years ago

Read 2 more answers