All categories

4 years ago

How do you do this please help me

Mathematics

2 answers:

KonstantinChe [14]4 years ago

5 0

Perimeter is the sum of the sides.
4x + 6 +3x + 2 = 57
7x + 8 = 57
7x = 49
x = 7

Nina [5.8K]4 years ago

4 0

The perimeter of a triangle is the sum of all sides' lengths.

Thus,

$P=6+4x+(3x+2)=7x+8.$

Given $P=57\ cm,$ you get

$7x+8=57,\\ \\7x=57-8,\\ \\7x=49,\\ \\x=\dfrac{49}{7},\\ \\x=7\ cm.$

Answer: x=7 cm.

You might be interested in

Please help and show work

oee [108]

Answer:

Coordinates of A': will NOT be the same

Coordinates of C': will NOT be the same

Perimeter of ABC: will be the same

Area of A'B'C': will be the same

Measure of ∠B: will be the same

Slope of A'C': will be the same

Step-by-step explanation:

We have a triangle ABC that will be translated (moved) 2 units down, 3 units to the right.

Since the triangle is moved, then the coordinates of every summit (A, B and C) will be affected. So,

Coordinates of A': will NOT be the same

Coordinates of C': will NOT be the same

However, since the triangle is only moved, not transformed in any way, not scaled up/down for example the following will remain the same:

Perimeter of ABC: will be the same

Area of A'B'C': will be the same

Measure of ∠B: will be the same

Since the triangle is only translated, not rotated or reflected the following will remain the same:

Slope of A'C': will be the same

3 0

4 years ago

In one evening jake spent 4 hours doing homework eating dinner and playing basketball .he spent 30 mins eating dinner ,1 hour pl

Effectus [21]

Answer:

It has taken Jake about 40 minutes to finish his Spanish homework.

Step-by-step explanation:

We know that:

Homework = 4 hours = Spanish + Math + Science + History
Spanish = 4 hours x 1/6
Math = 4 hours x 1/4
Science = 4 hours x 1/4
History = 4 hours x 1/3

Work:

Spanish = 4 hours x 1/6
=> 2 hours x 1/3
=> 2/3 hour
=> 2/3 x 60 minutes
=> 40 minutes

Hence, it has taken Jake about 40 minutes to finish his Spanish homework.

3 0

2 years ago

In a load of laundry, 60% of the socks are white. If there are 25 socks in the load, how many are white?

Firdavs [7]

Well turn 60 into a decimal 0.60 and then multiply by 25 which is 15

remember of in math means multiply

6 0

4 years ago

Read 2 more answers

A new weight-watching company, Weight Reducers International, advertises that those who join will lose an average of 10 pounds a

Ksenya-84 [330]

Answer:

The calculated value Z = 2.53 >1.96 at 0.05 level of significance

Null hypothesis H₀ is rejected

we accepted alternative hypothesis

we conclude that those joining Weight Reducers will lose greater than 10 pounds

Step-by-step explanation:

Step(i):-

Given the random sample size 'n' =50

Given data a new weight-watching company, Weight Reducers International, advertises that those who join will lose an average of 10 pounds after the first two weeks. The standard deviation is 2.8 pounds.

The mean of the Population 'μ' = 10pounds

The standard deviation of the Population 'σ' = 2.8 pounds

Given mean of the sample 'x⁻' = 9

Level of significance ∝ = 0.05

Step(ii):-

Null hypothesis :H₀: μ<10

Alternative hypothesis: H₁: μ>10

The test statistic

$z= \frac{x^{-} - mean}{\frac{S.D}{\sqrt{n} } }$

$z= \frac{9 - 10}{\frac{2.8}{\sqrt{50} } } = \frac{-1}{0.395} = 2.53$

The calculated value Z = 2.53

The tabulated value Z = 1.96 at 0.05 level of significance

Step(iii):-

The calculated value Z = 2.53 >1.96 at 0.05 level of significance

Null hypothesis H₀ is rejected

we accepted alternative hypothesis

Conclusion:-

we conclude that those joining Weight Reducers will lose greater than 10 pounds

6 0

3 years ago

Amanda can jog 181818 miles in 555 hours.

qwelly [4]

Answer:

145454.4

Step-by-step explanation:

Divide 181818 by 555, then multiply the answer by 444.

4 0

3 years ago