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3 years ago

Write a simplified expression that represents the perimeter of a triangle who has a length of 7x + 5 and a width of 3x - 8.

Mathematics

1 answer:

tino4ka555 [31]3 years ago

7 0

Answer:

The simplified expression would be 10x - 3

Step-by-step explanation:

add like terms.

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Someone help me with this geometry homework please

marshall27 [118]

Look at the attached files.

7 0

2 years ago

In the figure below,S is between Q and T and R is the midpoint of QS. If RS=4 And RT= 12 find QT

Oxana [17]

Qt = 16.

Because since rs Is equal to qr since r is the midpoint of qs. So qr is 8 and because s is the midpoint of the whole line. I multiply it by 2. Giving me 16 for the whole line

7 0

3 years ago

A population is estimated to have a standard deviation of 9. We want to estimate the population mean within 2, with a 99% level

cupoosta [38]

Answer:

The sample required is $n = 135$

Step-by-step explanation:

From the question we are told that

The standard deviation is $\sigma = 9$

The margin of error is $E = 2$

Given that the confidence level is 99% then the level of significance is mathematically evaluated as

$\alpha = 100-99$

$\alpha = 1 \%$

$\alpha = 0.01$

Next we will obtain the critical value $\frac{\alpha }{2}$ from the normal distribution table(reference math dot armstrong dot edu) , the value is

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.05 }{2} } = 2.58$

The sample size is mathematically represented as

$n = [ \frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ]^2$

substituting values

$n = [ \frac{ 2.58 * 9 }{2} ]^2$

$n = 135$

3 0

2 years ago

Plz this one can you answer

frozen [14]

Yuhhhhhhhhhh 82828191919110010202929229

7 0

2 years ago

DochEvi [55]

Use Ga_thMath(u) (brainly doesn't allow me to type it) To use the app u need to take a pic of the problem and then it will process it and you'll get ur answer ASAP(most of the time). Many questions have been asked before so search it on brainly.

8 0

2 years ago