2 years ago

At noon, the temperature is 76°F.

Mathematics

1 answer:

sergiy2304 [10]2 years ago

6 0

Answer:

25%

Step-by-step explanation:

% Change = Change ÷ Original × 100

% Change = 19 ÷ 76 × 100

% Change = .25 × 100

% Change = 25

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Conan had 180$ in the bank. Each week he deposits another 64$ that he earns mowing lawns. Is his account balance proportional to

balu736 [363]

No, because 64 does not go into 180 evenly.

3 0

3 years ago

Students at Mendel Middle School are planning a fair for their school's fundraiser. Liam volunteers to help plan the event. The

FinnZ [79.3K]

Answer:

15 hours

Step-by-step explanation:

$x$ is the number of hours that Liam volunteered in the first month

The next month he volunteered $1\dfrac{2}{3}$ times the time he volunteered the first month.

Total time he volunteered in the two months is 40 hours so

$x+1\dfrac{2}{3}x=40\\\Rightarrow x+\dfrac{5}{3}x=40\\\Rightarrow \dfrac{3x+5x}{3}=40\\\Rightarrow x=\dfrac{40\times 3}{8}\\\Rightarrow x=15$

Time he volunteered in the first month is 15 hours.

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2 years ago

Find two consecutive even natural number whose product is 168

Oduvanchick [21]

$2n(2n+2)=168\\
4n^2+4n-168=0\\
n^2+n-42=0\\
n^2+7n-6n-42=0\\
n(n+7)-6(n+7(=0\\
(n-6)(n+7)=0\\
n=6 \vee n=-7\\
-7\not \in \mayhbb{N}\\\\
2n=12\\
2n+2=14$

These numbers are 12 and 14.

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3 years ago

Help plz. 6th grade math

evablogger [386]

Answer:

2.5z^2+3z+4.2

Step-by-step explanation:

6 0

2 years ago

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chris can run at a constant speed of 12 km/h. How ling will it take him to run from his home to the park, a distance of 0.8 km?

densk [106]

Recall that distance = speed times time. Thus, time = distance / speed.

Here:

time = distance / speed = 0.8 km / 12 km/hr = 1/15 hr.

Note that 1/15 hr = 1/15 (60 min) = 4 minutes

8 0

2 years ago

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