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2 years ago

20 points! Please answer will mark brainlest.

Mathematics

2 answers:

DanielleElmas [232]2 years ago

7 0

Answer:

30°

Step-by-step explanation:

3x + (90 - 2x) = 180 - 60

x + 90 = 120

x = 120 - 90

x = 30°

malfutka [58]2 years ago

5 0

30 degrees is the answer my love

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PLEASE HELP. it is in the attachment

juin [17]

Answer:

<JKL=123

Step-by-step explanation:

57+57=114

360-114=246

246/2=123

<JKL=123

3 0

2 years ago

Read 2 more answers

4p + 8 - 3p - 2

kozerog [31]

Well that friend should write p + 6 after combining like terms and simplifying

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1 year ago

Cual es la sustitución de x/2+3=7

Maslowich

Answer:

conio

Step-by-step explanation:

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2 years ago

A research company desires to know the mean consumption of meat per week among people over age 40. A sample of 610 people over a

Papessa [141]

Answer: $(3.0,\ 3.2)$

Step-by-step explanation:

Confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$ (1)

, where $\overline{x}$ = Sample mean

$z_{\alpha/2}$ = Critical z-value

$\sigma$ = Population standard deviation.

n= Sample size.

As per given , we have

n= 610

$\sigma=1.1$

$\overline{x}=3.1$

Significance level for 85% confidence : $\alpha=1-0.85=0.15$

By z-table critical two tailed z-value : $z_{\alpha/2}=z_{0.075}=1.44$

Put all values in (1) , we get

$3.1\pm 1.44\dfrac{1.1}{\sqrt{610}}$

$3.1\pm 1.44\dfrac{1.1}{24.698}$

$3.1\pm 0.064$

$=(3.1-0.064,\ 3.1+0.064)=(3.036,\ 3.164)\approx(3.0,\ 3.2)$

Hence, the 85% confidence interval for the mean consumption of meat among people over age 40. = $(3.0,\ 3.2)$

5 0

3 years ago

Rewrite the fraction in the sentence below as a percentage.

klasskru [66]

Answer:

42%

Step-by-step explanation:

To find the percentage of a fraction, you divide the numerator by the denominator and multiply by 100:

$\frac{21}{50}=21/50=0.42*100=42percent$

4 0

3 years ago