All categories

3 years ago

Help me pls

Mathematics

2 answers:

agasfer [191]3 years ago

4 0

Answer:

7/4 which could also be written as 1 and 3/4

matrenka [14]3 years ago

3 0

Answer:

7/4

Step-by-step explanation:

first we take lcm of 3 , 4 , 6

8+3+10/12

calculate

21/12

after reduction

7/4

hope it helps , pls mark me as brainliest

You might be interested in

HURRY!!! How is completing the square beneficial? (in quadratic equation)

givi [52]

"Completing the square" is a step in the solution of quadratic equations. It can be accomplished without the guesswork or trial-and-error associated with methods like factoring, and it always leads to a solution. It is the method by which the quadratic formula is derived.

7 0

2 years ago

Show how can you find the unit rate without using the models

Hatshy [7]

Answer:

You can use equation or use a calculator.

Step-by-step explanation:

4 0

3 years ago

Solve the system of linear equations by graphing x+y=18 y=x+12

Vika [28.1K]

Answer:

it equals =204 y=12

8 0

2 years ago

A researcher wishes to estimate, with 99% confidence, the population proportion of adults who think the president of their co

scoray [572]

Answer:

a. n=4148

b. n=3909

c. The sample size is smaller if a known proportion from prior study is used. The difference in sample sizes is 239

Step-by-step explanation:

a. For sample where no preliminary estimate is given, the minimum sample size is calculated using the formula:

$n=p(1-p)(\frac{z}{ME})^2$

Where:

$ME=$ Margin of error
$p=$ is the assumed proportion

#Let p=0.5, substitute in the formula to solve for n:

$n=0.5(1-0.5)\times (2.576/0.02)^2\\\\=4147.36\approx 4148$

Hence, the minimum sample size is 4148

b. If given a preliminary estimate p=0.38, we use the same formula but substitute p with the given value:

$n=p(1-p)(z/ME)^2\\\\=0.38(1-0.38)(2.576/0.02)^2\\\\=3908.47\approx3909$

Hence, the minimum sample size is 3909

c. Comparing the sample sizes from a and b:

$n_{0.5}>n_{0.38}\\\\n_{0.5}-n_{0.38}=4148-3909=239$

Hence, the actual sample size is smaller for a known proportion from prior a prior study.

8 0

3 years ago

If the straight line passing through A(-7, -5) and B(-3, x) is parallel to another straight line of slope 2, find the value of x

Ostrovityanka [42]

X=3; you can set up a proportion using the slope equation. So (y[sub2]-y[sub1])/(x[sub2]-x[sub1])=2/1 then plug in the values and simplify. Then cross multiply and solve for x. Rest of work shown in the picture

8 0

2 years ago

Read 2 more answers