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zysi [14]
2 years ago
7

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

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