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Anvisha [2.4K]
3 years ago
5

Which is an equation of the line that passes through the points (-6,-8) and (4,-4)

Mathematics
1 answer:
natita [175]3 years ago
5 0

Answer:

y=\frac{2}{5}x-6.5

Step-by-step explanation:

\frac{(-8)-(-4)}{(-6)-4} \\ = \frac{-4}{-10} = \frac{2}{5\\}

y=mx+b

-8 = (\frac{2}{5}) (-6) +b

-8 = - \frac{12}{8} +b

b= -6.5

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Grace and her brother need $400 to go to band camp. Their parents have agreed to help them earn money by paying them $25 each ti
soldi70 [24.7K]

Answer:

25m + 10b = 400

Step-by-step explanation:

Total amount that can be earned = $ 400

Amount earned on mowing a lawn = $ 25

Amount earned per hour on babysitting = $10

Amount earned for mowing one lawn is $ 25, so amount earned for mowing m lawns will be $ 25m

Amount earned for one hour of babysitting is $ 10, so amount earned for babysitting for b hours will be $ 10b

Total amount earned = Amount earned from mowing m lawns + Amount earned from babysitting for b hours

Using the values from above, we can set up the equation as:

400 = 25m + 10b

7 0
3 years ago
rectangle A has 7 times the area of rectangle B. The width of rectangle A is 1/4 the width of rectangle B. The height of rectang
algol13

Answer:

just do 7 times 1/4 + the 12 thats your answer

Step-by-step explanation:

8 0
3 years ago
Cos30° cos45°-sin30° sin 45°​
sammy [17]

Answer:

(√6 - √2)/4

Step-by-step explanation:

cos30°cos45° - sin30°sin45°

= cos (30 + 45)°

= cos 75°

= (√6 - √2)/4

4 0
2 years ago
What is the solution of √1-3x = x+3 ?<br><br><br>​
Vadim26 [7]

Answer:

{-1, -8}

Step-by-step explanation:

Please enclose "1 - 3x" inside parentheses so the reader will know that you want the square root of all of "1 - 3x".

Squaring both sides of the given equation, we get:

1 - 3x = x^2 + 6x + 9, or  x^2 + 6x + 8 + 3x, or

x^2 + 9x + 8 = 0.  Factoring, we get:  (x + 8)(x + 1) = 0, so that the solutions are {-1, -8}.

5 0
2 years ago
Read 2 more answers
Michael has $12,500 to invest. he invests part in an account which earns 4.2% annual interest and the rest in an account which e
Dimas [21]
Suppose he invest x dollars in one account, y in the other
x+y=12,500
0.042x+0.062y=669.50
multiple the first equation by 0.042: 0.042x+0.042y=525
subtract this new equation from equation 2: 0.02y=144.50
y=7225
x=12500-7225=5275
8 0
2 years ago
Read 2 more answers
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