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vfiekz [6]
3 years ago
13

Eight times the sum of a number and -2 is the same as nine times the number. Find the number

Mathematics
1 answer:
Alik [6]3 years ago
5 0

Answer:

let \: the \: unknown \: number \: be \: x \\ 8 (x +  (- 2) = 9 \times x \\ 8  (x - 2) = 9 \times x \\ 8x - 16 = 9x \\  - 16 = 9x - 8x \\  - 16 = x \\ x =  - 16

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Someone help me please I don't know how to do this ! :(
Ivanshal [37]
4^{x+1}=21\\
x+1=\log_421\\
x=\log_421-1\\
x=\log_421-\log_44\\
x=\log_4\dfrac{21}{4}\\
x=\dfrac{\ln \dfrac{21}{4}}{\ln 4}\approx 1.1962
5 0
4 years ago
Match the equation with its corresponding solution for x: 4x+7=35
Goryan [66]
4x+7=35
4x=28
x=7

A corresponding solution of the matching equation is a fancier way of telling you to find the number that represents x
7 0
3 years ago
Ben owns a townhome valued at $195,000, but still owes $120,000 on the loan. Ben has $5,000 in savings and a balance of $1,400 o
IRISSAK [1]

Answer:

c $99,400

Step-by-step explanation:

$195,00-$120,000=$75,000

$75,000+$5,000+$1,400=81,400

$81,400+$38,000-$20,000=$99,400

3 0
3 years ago
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Need help I don’t understand new topic answers please
goblinko [34]

1) c= 3.5cm × 22/7

c= 77cm/7 = 11cm

2) c= 2×3.14×5cm

= 6.28× 5cm

=31.4cm

3) L=180/360 × 22/7 × 3cm

= 1/2 × 22/7 ×3cm

=4.71 cm

4) c=12cm ×3.14

=37.68cm

5) c = 4.5cm × 3.14

=14.13cm

6) c = 6.7cm × 3.14

= 21.038cm

6 0
2 years ago
Please help me with this!!!
guajiro [1.7K]

Answer: 41

Step-by-step explanation:

9*(-2)*(-2) - 4*(-2) - 3 = 9*4 + 8 - 3 = 36 + 5 = 41

3 0
4 years ago
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