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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.

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Rachel mows 5 lawns in 8 hours . at this, how many lawns can she mow in 40 hours? PLz put explanation too... or else »-(¯`·.·´¯)

s2008m [1.1K]

Answer:25

Step-by-step explanation:

40/8=5 5x5=25

7 0

3 years ago

Write the fraction 9/54 in simplest form.

slamgirl [31]

Answer:

1/6

Step-by-step explanation:

Divide by 3

9/54 = 3 / 18

You can again divide by 3 for the answer

1/6

5 0

3 years ago

Read 2 more answers

a bicycle has a listed price of $821.95 before tax. if the sales tax rate is 6.5%, find the total cost of the bicycle with sales

BlackZzzverrR [31]

Answer:

$875.39

Step-by-step explanation:

1) Divide the tax rate (6.500%) by 100 to get a decimal rate of 0.06500.

2) Multiply the purchase price ($821.95) by the 0.06500 to get a sales tax amount of $53.43.

3) Add the $53.43 sales tax to the $821.95 price to get a total of $875.38.

4) Round $875.38

3 0

3 years ago

(repost) Help Please I will Give brainliest If Correct!!

Eddi Din [679]

Answer:

There are about 7 x 10^6

Step-by-step explanation:

3.5*2029249= 7102347

rounds to 7000000= 7 x 10^6

6 0

3 years ago

Read 2 more answers

Daniel dives into a swimming pool. The height of his head is represented by the function h(t) = -8t2 - 28t + 60, where t is the

8_murik_8 [283]

So, h(t) is how far is Daniel's head from the surface of the water, namely the surface itself is when the height is nill, so his head is at the surface and the height of it is just 0, thus h(t) = 0. Namely, what is "t" when h(t) is 0?

$\bf h(t)=-8t^2-28t+60\implies \stackrel{h(t)}{0}=-8t^2-28t+60
\\\\\\
0=-2t^2-7t+15\implies 2t^2+7t-15=0\implies (2t+3)(t-5)=0
\\\\\\
\begin{cases}
2t+3=0\implies 2t=-3\implies &t=-\frac{3}{2}\\\\
t-5=0\implies &\boxed{t=5}
\end{cases}$

clearly the seconds cannot be a negative unit, so is not -3/2.

6 0

3 years ago