3 years ago

Need a little help on math

Mathematics

1 answer:

GrogVix [38]3 years ago

7 0

Answer:

Just sub the number for x.

Step-by-step explanation:

3a) 2(3)+3 = 9

3b) 2(-7)+3=(-11)

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30 POINTS I WILL GIVE U BRAINLIEST AND THANKS AND 5 STARS please help this is very important this is a big part of my grade

mars1129 [50]

Answer:

$1.\:2^x=64, x=\boxed{6},\\2.\:x=\left(\frac{2}{3}\right)^3,x=\boxed{\frac{8}{125}}\\3.\:3\cdot (3^4)=3^x, x=\boxed{5}\\4.\:\frac{16}{25}=x^2,x=\boxed{\frac{4}{5}},$

Step-by-step explanation:

$1.\\\\2^x=64,\\\log 2^x=\log64,\\x\log 2=\log 64,\\x=\frac{\log 64}{\log 2}=\boxed{6}$

$2.\\x=\left(\frac{2}{5}\right)^3=\frac{2^3}{5^3}=\boxed{\frac{8}{125}}$

3. This problem incorporates an exponent property.

Exponent property used: $a^b\cdot a^c=a^{(b+c)}$ , yielding an answer of $\boxed{5}$

$4.\\\\\frac{16}{25}=x^2,\\x=\sqrt{\frac{16}{25}}=\frac{\sqrt{16}}{\sqrt{25}}=\boxed{\frac{4}{5}}$

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3 years ago

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Which values are solutions to StartFraction k minus 3 Over 4 EndFraction >–2? Select two options. k = –10 k = –7 k = –5 k = –

SVETLANKA909090 [29]

Answer:

k = -5 and i think the other one is k=0

Step-by-step explanation:

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seropon [69]

Answer:

a) 54.6

b) 140

Step-by-step explanation:

7644 ÷ 140 = 54.6

so;

7644 ÷ 54.6 = 140

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3 years ago

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Find the value of 4x-6 when x=3 and y=-2

Bas_tet [7]

Answer:
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Step by step explanation:

4(3)-6
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4 x 3
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12-6
The solution is 6

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2 years ago

What is 40 times 16

kompoz [17]

Answer:

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Step-by-step explanation:

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