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Alexxandr [17]
3 years ago
7

Plz help i don’t understand this type of math

Mathematics
1 answer:
Serga [27]3 years ago
7 0
QRS = DRS + QRD
167 = x + 143 + x + 30
167 = 2x + 173
-2x = 173 - 167
-2x = 6
x = 6/-2
x = -3

DRS = x + 143
= (-3) + 143
= 140
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Two joggers start from opposite ends of an 8 mile course running towards each other. One jogger is running at a rate of 4 mph. T
Licemer1 [7]

Answer:

48 minutes

Step-by-step explanation:

Given: The distance between A and B is 8 miles. Speed of one jogger is 4 miles per hour, and speed of other jogger is 6 miles per hour.

To find: After how many minutes will the joggers meet, if they are running towards each other.

Solution:

Let both the joggers will meet after t hours, at point P between A and B.

We know that Distance=speed\times time

Let the jogger running at a speed of 4 miles per hour starts from point A.

So,

AP=speed\times time

AP=4\times t

AP=4t

Let the jogger running at a speed of 6 miles per hour starts from point B.

So,

BP=speed\times time

BP=6\times t

BP=6t

We have,

AP+BP=AB

\implies4t+6t=8

\implies10t=8

\implies t=\frac{8}{10}

\implies t=0.8

So, both the joggers will meet after 0.8 hours or 0.8\times60=48 minutes.

Hence, the joggers will meet after 48 minutes.

5 0
3 years ago
Please answer this correctly!
ryzh [129]

Answer:

1 1/4

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Please help me out..
sdas [7]

Answer:

x=41

y=139

Step-by-step explanation:

x+y = 180  since they form a straight line

y is 3x +16

y = 3x +16

Replace y in the first equation

x+3x +16 = 180

Combine like terms

4x +16 = 180

Subtract 16 from each side

4x+16-16 =180-16

4x =164

Divide each side by 4

4x/4 =164/4

x = 41

y = 3x +16

y = 3*41 +16 = 123+16 =139

5 0
3 years ago
How can you check if two fractions are equivalent?
zimovet [89]

Step-by-step explanation:

Say you have these 2 fractions

\frac{a}{b} .........\frac{c}{d}

Cross multiply as following;

\frac{(b)(c)}{(a)(d)}=\frac{bc}{ad}

If in the end, both numerator and denominator are equal, then the fractions are equivalent.

Examples:

Example 1

\frac{20}{24}...........\frac{5}{6}

Cross multiply

\frac{(24)(5)}{(20)(6)}=\frac{120}{120}

They're equivalent.

Example 2

\frac{20}{24}........\frac{3}{4}

Cross multiply

\frac{(24)(3)}{(20)(4)} =\frac{72}{80}

They're not equivalent.

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3 years ago
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Debora [2.8K]

Answer:

it dilated by two

Step-by-step explanation:

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