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2 years ago

Which of the following inequalities matches the graph?

Mathematics

1 answer:

inysia [295]2 years ago

3 0

X less than or equal to -7 is the answer. I drew a graph of what it should look like. The graph contains every value of x that is either equal or less than -7, which is the shaded part.

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A karat equals 1/24 part of gold in an alloy [ eg 9 karat gold is 9/24 gold]. How many grams of 9 karat gold must be mixed with

irinina [24]

This is a mixture problem.

Let the 9 karat gold to be mixed be x. The 18 karat would weight (200 - x). Since the total = 200g.

mass1 * karat1 + mass2*karat = total mass * total carat

Let mass1 be x g. mass 2 would be = (200 -x)
karat 1 = 9 karat 2 = 18

Total mass = 200g.
Total karat = 14.

9*x + 18*(200 -x) = 14*200

9x + 18*200 - 18*x = 14*200

18*200 + 9x - 18x = 14*200

3600 - 9x = 2800

3600 - 2800 = 9x

800 = 9x

9x = 800

x = 800/9

x ≈ 88.89

Therefore 88.89 grams of 9 karat gold must be mixed.

7 0

2 years ago

5(4x - 1.5x) + 12 = 4x - 2

MAXImum [283]

Answer:

-1.647058824

Step-by-step explanation:

search on googl

7 0

2 years ago

Read 2 more answers

A worker uses 900 inches of steel wire to make 600 springs of the same size. At this rate how

a_sh-v [17]

Can I get your number and I will help you

7 0

3 years ago

(2.5×10^−10)(7×10^−6)

Nataly [62]

<span>(2.5×10^−10)(7×10^−6)
= (2.5 x 7) (</span>10^−10 x 10^−6)
= 17.5 x 10^-16
= 1.75 x 10^-15

answer
<span>B. 1.75×10^−15 </span>

6 0

3 years ago

How to calculate the distance for graphs?

ollegr [7]

Answer:

$\sqrt{(x1-x2)^{2}+(y1-y2)^{2} }$

Step-by-step explanation:

This is the distance formula for cartesian coordinate systems, or your typical xy graph. If given two points to find the distance between, you can assign '1' or '2' to the points, i.e. (1,1) and (2,2) could be: (1,1) is (x1,y1) and (2,2) is (x2,y2). It doesn't matter which point is 1 or 2. If we were to use those example points in this formula, we would have:

$\sqrt{(1-2)^{2}+(1-2)^{2}}$

We can simplify and come up with:

$\sqrt{(-1)^{2}+(-1)^{2}}$

= $\sqrt{2}$

We must remember that square roots can be positive OR negative, HOWEVER, because you are looking for a distance it must be positive $\sqrt{2}$ .

Hope this helped!

4 0

2 years ago