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2 years ago

7

Solve and show the answer in simplest terms: 4/5 + 2/3

2 answers:

Annette [7]2 years ago

6 0

Exact Form:

22

15

Decimal Form:

1.4

¯

6

Mixed Number Form:

1

7

15

brainliest pls :3

Lana71 [14]2 years ago

3 0

Answer:

1.46666666667

Step-by-step explanation:

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Please help!<br>5.7km/h = ?ft/h

Step2247 [10]

The correct answer is 18696 ft/hour

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3 years ago

Find a parametric representation of the solution set of the linear equation. (Enter your answer as a comma-separated list of equ

STALIN [3.7K]

Answer:

x = s, y = t, z = 8 -s -t

Step-by-step explanation:

It can work reasonably well to let s and t represent any of a pair of the variables. In the answer above, we have used x=s, y=t.

You could get more elaborate if you want:

x = 4-s, y = 4-t, z = s+t

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3 years ago

The entire group being studied, and from which samples are taken, is called

Kazeer [188]

I believe the answer is population Hope this helped=) <span />

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3 years ago

Read 2 more answers

Evaluate each expression.

KonstantinChe [14]

Answer:

Please check the explanation.

Step-by-step explanation:

Solving the expressions

7)

given the expression

$\left(-7\right)+\:\left(-10\right)\:-\:5\:+2$

$\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}$

$\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:\:$

$\mathrm{Apply\:rule\:}+\left(-a\right)\:=\:-a$

so

$=\left(-7\right)-10-5+2$

$=-17-5+2$

$=-22+2$

$=-20$

8)

$\left(-9\right)+4+\left(-8\right)-\left(-7\right)$

$\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}$

$\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:\:$

$\mathrm{Apply\:rule\:}+\left(-a\right)\:=\:-a$

so

$=-5+\left(-8\right)-\left(-7\right)$

$=-5-8-\left(-7\right)$

$=-13-\left(-7\right)$

$=-13+7$

$=-6$

9)

$\left(-6\right)\:-\:\left(2\:\times \:4\right)\:-\:\left(-1\right)\:$

$\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}$

$\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:\:$

so

$\left(-6\right)-\left(2\times \:4\right)-\left(-1\right)$

Calculate within parentheses

$=\left(-6\right)-8-\left(-1\right)$

$=-14-\left(-1\right)$

$=-14+1$

$=-13$

10)

$\left(-8\right)\:+\:\left(-4\:\div \:-4\right)\:-\:8$

solving

$\left(-8\right)+\left(-\frac{4}{-4}\right)-8$

$\mathrm{Remove\:parentheses}:\quad \left(-a\right)=-a$

$=-8-\frac{4}{-4}-8$

$=-8-\left(-1\right)-8$

$\mathrm{Apply\:rule}\:-\left(-a\right)=a$

$=-8+1-8$

$\mathrm{Add/Subtract\:the\:numbers:}\:-8+1-8=-15$

$=-15$

5 0

3 years ago

Issac, BYU-Idaho student, found an old article in the school paper, the Scroll, that asserted that 11% of girls "wait for their

ololo11 [35]

Answer: 151

Step-by-step explanation:

When the prior estimate of population proportion is available , then the formula for sample size: $n=p(1-p)(\dfrac{z^*}{E})^2$

, where p= prior estimate of population proportion

z*= critical-value.

E= Margin of error.

Let p be the proportion of of girls "wait for their missionary".

p = 11% =0.11

E= ± 0.03

The critical z-value corresponding to 90% confidence level = z*=1.645 [using z-table ]

Substitute all the values in the above formula , we get

Required sample size : $n=(0.11)(1-0.11)(\dfrac{(1.96)}{0.05})^2$

$\Rightarrow\ n=(0.11)(0.89)(39.2)^2$

$\Rightarrow\ n=(0.0979)(1536.64)\\\\\Rightarrow\ n=150.437056\approx151$ [Rounded to next integer.]

Thus, the number of observations he needs in his sample = 151

8 0

4 years ago