3 years ago

Can someone help meeeeeeeeeeeeeeee

Mathematics

2 answers:

nlexa [21]3 years ago

8 0

The answer is D. 13.5 and 20.25

Sergeeva-Olga [200]3 years ago

8 0

I think the answer is C.

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5 / 4 x + 3 = x - 1 / 4

tiny-mole [99]

5/4x+3 = x-1/4
5/4x-x = -1/4-3
1/4x = -13/4
x = -13/4.4
x = - 13

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3 years ago

Quadratic equations question 1 ^^

ser-zykov [4K]

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3 years ago

Find the scale factor for the dilation. please show your work.<br><br> X (3. 6) X' (2, 4)

Anastasy [175]

Answer:

Step-by-step explanation:

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3 years ago

wind resistance varies jointly as an objects surface area and velocity. if an object traveling at 55 miles per hour with a surfa

nikdorinn [45]

Answer:

25 miles per hour

Step-by-step explanation:

Given

$W = Wind\ resistance$

$A = Surface\ Area$

$V = Velocity$

The joint variation can be represented as:

$W\ \alpha\ A*V$

Where:

$V = 55; A = 20; W = 220$

Required

Find V, when: $A = 55; W = 275$

We have:

$W\ \alpha\ A*V$

Express as an equation

$W= k *A*V$

Where k is the constant of variation

Make k the subject

$k = \frac{W}{A*V}$

When: $V = 55; A = 20; W = 220$

We have:

$k = \frac{220}{20 *55 }$

$k = \frac{220}{1100}$

$k = 0.2$

When: $A = 55; W = 275$

We have:

$k = \frac{W}{A*V}$

Substitute: $A = 55; W = 275$ and $k = 0.2$

$0.2 = \frac{275}{55 * V}$

Make V the subject

$V= \frac{275}{55 * 0.2}$

$V= \frac{275}{11}$

$V= 25$

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3 years ago

2/5of a number is 80. What is 3/4of the same number?

lara [203]

Answer:

2/5of a number is 80 5/5 = 1 32/1 = simplified = 32

3/4 of the same number 0.75

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3 years ago