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3 years ago

Ifm=2 2/3, what is the value of 5(m+2)?

Mathematics

2 answers:

Kazeer [188]3 years ago

4 0

Answer:

Step-by-step explanation:

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Contact [7]3 years ago

4 0

Answer:

If m=2

According to the question,

3×2-5

6-5

The value of m is 1

Hope it will help you.

Step-by-step explanation:

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A metalworker has a metal alloy that is 15% copper and another alloy that is 60% copper. How many kilograms of each alloy shou

coldgirl [10]

18 kg of 15% copper and 72 kg of 60% copper should be combined by the metalworker to create 90 kg of 51% copper alloy.

<u>Step-by-step explanation:</u>

Let x = kg of 15% copper alloy

Let y = kg of 60% copper alloy

Since we need to create 90 kg of alloy we know:

x + y = 90

51% of 90 kg = 45.9 kg of copper

So we're interested in creating 45.9 kg of copper

We need some amount of 15% copper and some amount of 60% copper to create 45.9 kg of copper:

0.15x + 0.60y = 45.9

but

x + y = 90

x= 90 - y

substituting that value in for x

0.15(90 - y) + 0.60y = 45.9

13.5 - 0.15y + 0.60y = 45.9

0.45y = 32.4

y = 72

Substituting this y value to solve for x gives:

x + y = 90

x= 90-72

x=18

Therefore, in order to create 90kg of 51% alloy, we'd need 18 kg of 15% copper and 72 kg of 60% copper.

6 0

3 years ago

Find the area and round to the nearest tenth: Diameter equals 5 1/2 yards

sammy [17]

The formula for area of a circle is A=rsquared*3.14. Divide 5.5/2 to get 2.75. Mulitply 2.75 times 2.75 to get approximately 7.56. Then, multiply that times 3.14 to get approximately 23.74.

Answer=23.74 yards

3 0

3 years ago

In clinical trials of a newly developed cold medicine, it was found that 45 out of 200 individuals that took the new medicine (G

ddd [48]

Answer:

Step-by-step explanation:

Group 1 Information:

sample size : n₁ = 200

individuals with stomach as a side effect x₁ = 45

p₁ = 45 / 200 p₁ = 0,225 then q₁ = 1 - p₁ q₁ = 0,775

Group 2 Information:

sample size : n₂ = 150

individuals with stomach as a side effect x₂ = 33

p₂ = 33/150 p₂ = 0,22 q₂ = 0,78

Hypothesis Test:

Null Hypothesis: H₀ p₁ = p₂

Alternative Hypothesis Hₐ p₁ > p₂

The alternative hypothesis indicates that the test is a one-tail test to the right

Significance level is α = 0,01 ( confidence interval 99%)

From z-table we get z(c) for that α z(c) = 2,32

To calculate z(s)

z(s) = ( p₁ - p₂ ) / EED

EED = √ ( p₁*q₁)/n₁ + ( p₂*q₂)/n₂

EED = √ ( 0,225*0,775)/200 + (0,22*0,78)/150

EED = √ 0,0008718 + 0,001144

EED = 0,045

z(s) = ( 0,225 - 0,22 ) / 0,045

z(s) = 0,005 / 0,045

z(s) = 0,11

Comparing z(s) and z(c)

z(s) < z(c) 0.11 < 2.32

Then z(s) is in the acceptance region. We accept H₀ . We don´t have evidence to support differences between the two groups.

6 0

3 years ago

I need help please ❤️❤️❤️❤️❤️

postnew [5]

Answer:

m1=51

m2=18

m3=123

m4=39

Step-by-step explanation:

6 0

3 years ago

To solve a system of inequalities graphically, you just need to graph each inequality and see which points are in the overlap of

Neporo4naja [7]

Consider a system of inequalities

Consider inequality in two variable

1. a x + b y ≤ c

2 . p x + q y ≥ r 3. x ≥ 0 4. y≥ 0

By drawing the graph ,You can find the region bounded by inequality 1, then reason bounded by inequality 2 , and then you can find the region common to both the inequality.

Consider the given inequality

x + y ≤2

x + y ≥1,

x≥ 0, y≥0.

You can find the solution below.

So, the Statement, To solve a system of inequalities graphically, you just need to graph each inequality and see which points are in the overlap of the graphs is True.

7 0

3 years ago

Read 2 more answers