All categories

3 years ago

Determine whether the number is divisible by 3.give a reason based on the tests for divisibility 72

1 answer:

5 0

72 is dividable by 3. It is divisible by 3 because when you add 7 and 2, you get 9. According to the tests for divisibility, if the sum of the digits is divisible by 3, then the whole number is. 9 is divisible by 3, therefore 72 is as well.

You might be interested in

Simplify the expression. (3.5x - 5) + (7.2x + 10)

Andru [333]

Answer: 10.7x + 5

Step-by-step explanation:

(3.5 + 7.2)x + (-5 + 10) = 10.7x + 5

8 0

3 years ago

Solve the quadratic equation 3x² + 2x-4=0 Give your answers to 2 decimal places.

GalinKa [24]

3x² + 2x - 4 = 0

Δ = b² - 4.a.c

Δ = 2² - 4 . 3 . -4

Δ = 4 - 4. 3 . -4

Δ = 52

x = (-b +- √Δ)/2a

x' = (-2 + √52)/2.3

x'' = (-2 - √52)/2.3

x' = 0,8685170918213297

x'' = -1,5351837584879966

2 Decimal places

x' = 0,87

x'' = -1,54

6 0

3 years ago

Read 2 more answers

Which are the two number that multiply is 300 and subtraction is 35

alukav5142 [94]

Answer:

15 and 20

Step-by-step explanation:

4 0

3 years ago

100 points!!! Show your work on paper

lyudmila [28]

Answer:

10 cm, 15 cm

Step-by-step explanation:

Set ratios and solve for x

Corresponding sides are AC with A'C' and CB with C'B'

AC/A'C' = CB/C'B'
(x - 1)/2 = (x + 4)/3
3(x - 1) = 2(x + 4)
3x - 3 = 2x + 8
3x - 2x = 8 + 3
x = 11

Find the values of AC and CB:

AC = x - 1 = 11 - 1 = 10 cm
CB = x + 4 = 11 + 4 = 15 cm

5 0

3 years ago

Read 2 more answers

Identify the missing numbers below:

IRISSAK [1]

Answer:

A = 7.7

b = 26

Step-by-step explanation:

$(3.5 \times 10^{16})(2.2 \times 10^{10}) = A \times 10^b \\ 3.5 \times 2.2 \times 10^{16} \times 10^{10}= A \times 10^b \\ 7.7 \times {10}^{16 + 10} = A \times 10^b \\ 7.7 \times {10}^{26} = A \times 10^b \\ equating \: like \: terms \: on \: both \: sides \\ A = 7.7 \\ 10^b = {10}^{26} \\ \implies \: b = 26$

4 0

3 years ago