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3 years ago

Help asap!! Means a lot. 46 pts (:

Mathematics

2 answers:

adell [148]3 years ago

8 0

Slope = (-7+4) / (7-1) = -3/6 = -1/2

using point (1,-4)
equation y + 4 = -1/2(x - 1)

answer is C.
y + 4 = -1/2(x - 1)

Margarita [4]3 years ago

7 0

Your answer is c!

First, we find the slope.

$(-7+4) / (7-1) = -\frac{3}{6} = -\frac{1}{2}$

Now, we use this point.

$(1,-4)$

So, this is the equation that we have.

$y + 4 = -\frac{1}{2} (x - 1)$

So, thats the answer

C, $y + 4 = -\frac{1}{2} (x - 1)$

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The scale used on a map is 5 millimeters represents 32 kilometers. How many millimeters represent 160 kilometers?

goblinko [34]

160/32= 5

5*5= 25 mm

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3 years ago

Hannah is at the supermarket to buy carrots and potatoes. If she buys 2 pounds of carrots and 3 pounds of potatoes, it will cost

zhenek [66]

Answer:

Carrots cost $ 1.75 a pound which is more than potatoes cost.

Step-by-step explanation:

Let,

Carrots cost $ x per pound and potatoes cost $ y per pound.

Buying 2 pounds of carrots and 3 pounds of potatoes will cost her

$ $(2\times x + 3\times y)$

and

Buying 4 pounds of carrots and 4 pounds of potatoes will cost her

$ $(4\times x + 4\times y)$

According to the question,

$(2\times x + 3\times y) = 8$ -----(1)

$(4\times x + 4\times y) = 13$ -----(2)

multiplying (1) by 2 we get,

$(4\times x + 6\times y) = 16$ -----(3)

Deducting (2) from (3) we get,

$2\times y = 3$

⇒ $y = \frac{3}{2} = 1.5$ ------------------(4)

Putting value of y in (1) we get,

$(2\times x = 8 - 3\times 1.5) = 3.5$

⇒ $x =\frac{3.5}{2} = 1.75$ ------------(5)

8 0

3 years ago

The circumference of a circle is 11r inches. What is the area, in square inches, of the circle? Express your answer in terms of

ira [324]

Answer:

69.12r square inches

Step-by-step explanation:

C = 2πr

= 2 x π x 11r

= 69.12r

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3 years ago

How to find the area?

Ymorist [56]

Answer:

area=

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Step-by-step explanation:

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3 years ago

Select all the pairs of equivalent expressions.

iren2701 [21]

Answer:

$\huge\boxed{(3^4)^4=3^8\cdot3^8}\\\boxed{4^3\cdot5^3=20^3}\\\boxed{(4^3)^3=4^3\cdot4^3\cdo4^3}$

Step-by-step explanation:

$a^n\cdot a^n=a^{n+m}\\\\(a^n)^m=a^{n\cdot m}\\\\(a\cdot b)^n=a^n\cdot b^n\\=====================$

$(4^3)^3=4^{3\cdot3}=4^9\\4^3\cdot4^3=4^{3+3}=4^6\\\\4^9\neq4^6\to(4^3)^3\neq4^3\cdot4^3\\==================$

$(3^4)^4=3^{4\cdot4}=3^{16}\\3^8\cdot3^8=3^{8+8}=3^{16}\\\\(3^4)^4=3^8\cdot3^8\\================$

$6^4\cdot3^4=(6\cdot3)^4=18^4\\\\18^4\neq18^8\to6^4\cdot3^4\neq18^8\\=================$

$4^3\cdot5^3=(4\cdot5)^3=20^3\\\\4^3\cdot5^3=20^3\\=================$

$(4^3)^3=4^{3\cdot3}=4^9\\4^3\cdot4^3\cdot4^3=4^{3+3+3}=4^9\\\\(4^3)^3=4^3\cdot4^3\cdot4^3$

3 0

3 years ago