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noname [10]
2 years ago
3

Two negative integers are 8 units apart on the number line and have a product of 308. Which equation could be used to determine

x, the smaller negative integer? A: x^2 + 8x – 308 = 0 B: x^2 – 8x + 308 = 0 C: x^2 + 8x + 308 = 0 D: x^2 − 8x − 308 = 0
Mathematics
1 answer:
Ksju [112]2 years ago
4 0

Answer:

A

Step-by-step explanation:

The smaller negative integer is x.

The larger one is x+8, since they are 8 units apart.

The equation would be:

x*(x+8)=308

Let's simplify it by distributing.

x^2+8x=308

Subtract 308 from both sides.

x^2+8x-308=0

Therefore, the answer would be A.

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Bruce's speed when swimming in still water is 5 meters/second. He is swimming in a direction 25° east of north. The current is m
Vsevolod [243]

Answer:

<2.1130913087, 4.53153893518>;  <−3.03108891325, −1.75>; <−0.91799760455, 2.78153893518>

Step-by-step explanation:

Bruce's vector is <5cos(90-25), 5sin(90-25)> = <5cos(65), 5sin(65)> ≈ <2.1130913087, 4.53153893518>

The wind's vector is <3.5cos(270-60), 3.5sin(270-60)> = <3.5cos(210), 3.5sin(210)>  ≈ <−3.03108891325, −1.75>

You add them together to find his actual motion:

<−0.91799760455, 2.78153893518>

7 0
2 years ago
The graph of g(x) is the graph of f(x)=x+6 reflected across the x-axis. Which equation describes the function g?
nika2105 [10]
ANSWER

The correct answer is g(x)=-x-6

EXPLANATION

The mapping for reflection across the x-axis is given by (x,-y)

Given f(x)=x+6. We can let y=x+6

we can write the ordered pair (x,y) or (x,x+6) as the ordered pair of the preimage of f.

The image function will have the ordered pair (x,-y)

or

(x,-x-6).

That is, we negate all the y-coordinates.

Therefore

g(x)=-x-6.

4 0
2 years ago
Read 2 more answers
If 265 identical boxes, each containing 24 books weigh a total of 12,720 pounds, how much does each book weigh?
ivann1987 [24]
Each book ways 2 pounds


please like and rate
3 0
2 years ago
Read 2 more answers
(b) 3m - 2n=19<br> 5m + 7n=11​
Korvikt [17]

3m-2n=19

5m+7n=11

21m-14n=133

10m+14n=22

Now add equations

31m=155

m=5

Now let's find n

3×5-2n=19

-2n=4

n=-2

Answer: (5; -2)

6 0
2 years ago
ABCD is a rectangle and A and B are the points (4,2) and (2,8) respectively. Given that the equation of AC is y=x-2, find a) Equ
Rudik [331]

A(4,2), B(2,8)

AC: y=x-2

Point point form for a line through (a,b) and (c,d) is (c-a)(y-b)=(d-b)(x-a)

AB is  (2 - 4)(y - 2) = (8-2)(x-4)

-2(y - 2)=6(x-4)

y - 2 = -3(x-4)

y = -3x + 14

BC is perpendicular through B, so slope 1/3 and we calculate the constant as y-(1/3)x:

y = (1/3) x  + (8 - (1/3)(2) ) = (1/3) x + 22/3

a)Answer:  BC is  y =  (1/3) x + 22/3

C is the meet of AC and BC,

x - 2 = (1/3) x + 22/3

3x - 6 = x + 22

2x = 28

x = 14

y = x-2 = 12

Check: y = (1/3)x + 22/3 = (14+22)/3 = 36/3 = 12  good

C(14,12)

The remaining corner is D.   We have A-B=D-C or

D = A+C-B+C = (4,2)+(14,12)-(2,8) = (16, 6)

b)Answer: B(2,8) [given, but asked for]  C(14,12), D(16,6)

8 0
2 years ago
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