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3 years ago

Tina must select and answer in any order seven of ten essay questions on a test. In how many ways can she do so?

Mathematics

1 answer:

gladu [14]3 years ago

6 0

Answer:

There are 127 Possible ways/combinations for this

Step-by-step explanation:

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Simply 7/4 squared

klemol [59]

Answer:

0.4375

Step-by-step explanation:

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3 years ago

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4) −4b + 3 = 35 <br> solve equation

rosijanka [135]

Answer:

-8

Step-by-step explanation:

when you substitute -8 for b it is -4(-8)+3=35

-4(-8) is 32 and 32+3=35

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Can someone please help me .?

MariettaO [177]

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Step-by-step explanation:

5+7

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3 years ago

2log(2a - 1) = 0<br> How

Kryger [21]

Answer:

Step-by-step explanation:

$2\log(2a-1)=0\\\\\text{Domain:}\\\\2a-1>0\qquad\text{add 1 to both sides}\\2a-1+1>0+1\\2a>1\qquad\text{divide both sides by 2}\\\dfrac{2a}{2}>\dfrac{1}{2}\\\boxed{a>0.5}\\============================\\\\2\log(2a-1)=0\qquad\text{divide both sides by 2}\\\\\dfrac{2\!\!\!\!\diagup\log(2a-1)}{2\!\!\!\!\diagup}=\dfrac{0}{2}\\\\\log(2a-1)=0\qquad\text{use}\ \log_ab=c\iff b=a^c\\\\\log(2a-1)=\log10^0\\\\\log(2a-1)=\log1\iff2a-1=1\qquad\text{add 1 to both sides}\\\\2a-1+1=1+1\\\\2a=2\qquad\text{divide both sides by 2}\\\\\dfrac{2a}{2}=\dfrac{2}{2}\\\\a=1\in D$

3 0

3 years ago

9-c=-13<br> What’s the answer

trapecia [35]

First you do -13+9. That equals -4.
Then bring down -c=-4 because there is a 1 in front of the c so -1c.
Next divide both sides by -1. The -c side cancels out so then your left with -4/-1.
That equals positive 4.
C=4
That’s ur answer.

7 0

3 years ago

Tina must select and answer in any order seven of ten essay questions on a test. In how many ways can she do​ so?

Tina must select and answer in any order seven of ten essay questions on a test. In how many ways can she do so?