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3 years ago

Please help me I don't knoe how to do these

Mathematics

2 answers:

Helga [31]3 years ago

8 0

The answer is A. Method is attached as picture.

Andreas93 [3]3 years ago

8 0

The answer should be D but i think it is right

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What is the y-intercept of the line represented by the equation y = 2x - 3?

cestrela7 [59]

Y =Mx + C
where M = gradient / slope
C = y intercept

comparing with y = 2x - 3
M = 2
C = -3

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2 years ago

1a)What was the original price if: after a 10% discount, it became $450

hoa [83]

Hi! The answer for the first one is 500
50 times 9=450
10% is 50
50 times 10= 500
The original price was 500.
The discount was $50
For the second one the answer is $10
The discount was $7
10-7=3
10% is 1 , 30% is 3 and 70% is 7

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2 years ago

Which one is not a function? And why not ?

stira [4]

Answer:

the selected answer/2

Step-by-step explanation:

not a function because the same y has 2 different x values

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2 years ago

Three paths intersect to form a right triangle as shown here. The path from the picnic area to the fountain is 500 yards. The pa

nata0808 [166]

Answer:

400 yd

Step-by-step explanation:

It's a 3 - 4 - 5 triangle

If the hypotenuse is a multiple of 5 and another length is the same multiple of 3 or 4, the one left over will be the same multiple of the one that's left.

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3 years ago

Im being timed<br>which number line represents the solution set for the inequality?

Ludmilka [50]

Answer:

The solution is:

$-\frac{1}{2}x\ge \:4\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:x\le \:-8\:\\ \:\mathrm{Interval\:Notation:}&\:(-\infty \:,\:-8]\end{bmatrix}$

The number line graph of the solution is also attached below.

From the graph, it is clear that the 2nd number line represents the solution set for the inequality.

Step-by-step explanation:

Given the inequality

$-\frac{1}{2}x\ge 4$

Let us solve the inequality

$-\frac{1}{2}x\ge 4$

Multiply both sides by -1 (reverse the inequality)

$\left(-\frac{1}{2}x\right)\left(-1\right)\le \:4\left(-1\right)$

Simplify

$\frac{1}{2}x\le \:-4$

Multiply both sides by 2

$2\cdot \frac{1}{2}x\le \:2\left(-4\right)$

Simplify

$x\le \:-8$

Thus, the solution is:

$-\frac{1}{2}x\ge \:4\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:x\le \:-8\:\\ \:\mathrm{Interval\:Notation:}&\:(-\infty \:,\:-8]\end{bmatrix}$

The number line graph of the solution is also attached below.

From the graph, it is clear that the 2nd number line represents the solution set for the inequality.

5 0

3 years ago