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2 years ago

Change 3/8 to percent

Mathematics

1 answer:

devlian [24]2 years ago

8 0

Answer:

37.5%

Step-by-step explanation:

do 3 divided by 8

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ASAP please help please!!!

WITCHER [35]

Here, ∠1 and ∠2 are complementary angles which means they together are forming a right angle or we can also say that their sum is 90°.So, According to this:

$\sf∠1 + ∠2 = 90$

∠1 = x-8
∠2 = 6x

$\sf \: x - 8 + 6x = 90$

$\sf \: 7x - 8 = 90$

$\sf \: 7x = 90 + 8$

$\sf \: 7x = 98$

$\sf \: x = 14$

$\tt∠1 = x - 8 \\ \tt = 14 - 8 \\ \tt = 6$
$\tt \: ∠2 = 6x \\ \tt = 6 \times 14 \\ \tt = 84$

<em>Thus, The measure of m∠1 is 6° and measure of m∠2 is 84°...~</em>

7 0

2 years ago

Juan ate 15 grapes in 30 seconds at this rate how long should it take him to eat 85 grapes

Ghella [55]

85 / 15 = 5 2/3
30 x 5 = 150
2/3 x 30 = 20
The answer is 170 seconds, or 2 minutes and 50 seconds

7 0

3 years ago

Read 2 more answers

Jeff bicycles 126 miles at the rate of r mph. The same trip would have taken 2 hours longer if he had decreased his speed by 4 m

weqwewe [10]

Given Information:

Distance = 160 miles

Required Information:

Rate = r = ?

Answer:

Rate = r = 20 mph

Step-by-step explanation:

Recall that the rate is given by

Rate = distance/time

$r = \frac{d}{t} \\\\t = \frac{d}{r} \\\\t = \frac{160}{r} \\\\$

It is given that the same trip would have taken 2 hours longer if he had decreased his speed by 4 mph.

Mathematically,

$\frac{160}{(r-4)} = \frac{160}{r} + 2 \\\\$

Simplify the equation

$\frac{160}{(r-4)} - \frac{160}{r} = 2 \\\\\frac{160r - 160(r-4)}{r(r-4)} = 2 \\\\\frac{160r - 160r+640)}{r(r-4)} = 2 \\\\160r - 160r+640 = r(r-4) (2) \\\\640 = r(r-4) (2) \\\\640 = (r^2 - 4r) (2) \\\\640 = 2r^2 - 8r \\\\2r^2 - 8r-640 =0 \\\\2(r^2 - 4r-320) =0 \\\\r^2 - 4r-320 =0 \\\\$