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3 years ago

Use the distance formula to find the distance to the nearest 10th from R(7,-2) to w(-2,3).

Mathematics

1 answer:

Jlenok [28]3 years ago

7 0

Answer:

10.3

Step-by-step explanation:

d = sqrt ((x2 - x1)^2 + (y2 - y1)^2)

(7,-2)....x1 = 7 and y1 = -2

(-2,3)...x2 = -2 and y2 = 3

now we sub

d = sqrt ((-2 - 7)^2 + (3 - (-2)^2)

d = sqrt ((-9^2) + (5^2))

d = sqrt (81 + 25)

d = sqrt (106)

d = 10.295 rounds to 10.3 <===

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neonofarm [45]

K - scale factor
a = 8 1/2
b = 11
a₁ = 1 7/10
b₁ = 2 1/5

$k = \frac{a_1}{a}=\frac{b_1}b\\\\\\\frac{a_1}{a}=\dfrac{1 \frac{7}{10}}{8\frac12}=1 \frac{7}{10}:8\frac12=\frac{17}{10}:\frac{17}2=\frac{17}{10}\cdot\frac2{17}=\frac15\cdot\frac11=\frac15\\\\\\\frac{b_1}{b}=\dfrac{2 \frac{1}{5}}{11}=2\frac15:11=\frac{11}{5}\cdot\frac1{11}=\frac15\cdot\frac11=\frac15 \\\\\\\frac{a_1}{a}=\frac{b_1}b=\frac15\ \ \ \implies\ \ \ k=\frac15$

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3 years ago

The ratio of Alex's toy cars to Jim's is 8:3. How many toy cars do they have altogether, if Alex has 40 more cars than Jim?

aniked [119]

Answer:

A:J

8:3

a - 40 = j

8y - 40 = 3y

5y = 40

y = 8

8 *11 = 88

Step-by-step explanation:

Hope i helped! have a nice day

5 0

3 years ago

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What is the answer to -3+y=-5

Stolb23 [73]

Answer:

y=-2

Step-by-step explanation:

you are solving for the variable y

add 3 to the opposite side, so it cancels out

y=-5+3

y=-2

4 0

3 years ago

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What is the inverse of the equation f(x)=3x−8

inysia [295]

Should be 8)/3 = (3x - 8 + 8)/3 = 3x /3 = x.

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3 years ago

Help plzzzzzz! Sandy works at a clothing store. She makes $9 per hour plus earns 10% commission on her sales. She worked 72 hour

Mamont248 [21]

Answer:

Step-by-step explanation:

Payment per hour is $8

commission is 15%

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commission earned for 2 weeks:

15/100×2095

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Total amount earned in 73 hours:

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Total amount earned in commission and wages:

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3 years ago