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Minchanka [31]
3 years ago
7

A calculator showed the answer to a multiplication problem as 2.8e–4.

Mathematics
1 answer:
jolli1 [7]3 years ago
8 0
2.8 X 10-4. The last one
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The system of equations shown below is graphed on a coordinate grid:
ankoles [38]

Answer:

A) (-2,2) lies on both lines

Step-by-step explanation:

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3 years ago
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Find the x-intercept of the line 3x - 9y = 15.
erastovalidia [21]

Answer:

The x-intercept is 5.

Some people prefer you right it as a point (5,0).

Step-by-step explanation:

The x-intercept can be found by setting y=0 and solving for x.

Just like to find the y-intercept you can set x=0 and solve for y.

Let's find the x-intercept.

So we will set y=0 and solve for x:

3x-9y=15

3x-9(0)=15

3x-0    =15

3x        =15

Divide both sides by 3:

 x         =15/3

 x          =5

So the x-intercept is (5,0).

4 0
3 years ago
Beth is painting a picture. She usually buys acrylic paints at Michaels for $5.25 a tube. She runs out of black paint so she goe
andre [41]

Answer:

5.25

Step-by-step explanation:

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3 years ago
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On a particular day, the wind added 4 miles per hour to Alfonso's rate when he was cycling with the wind and subtracted 4 miles
Agata [3.3K]
(v+4)t=66

t=66/(v+4)

...

(v-4)t=42, using t found above in this equation gives you:

66(v-4)/(v+4)=42  perform indicated multiplication on the left side

(66v-264)/(v+4)=42  multiply both sides by (v+4)

66v-264=42v+168  add 264 to both sides

66v=42v+432  subtract 42v from both sides

24v=432  divide both sides by 24

v=18

So his normal bicycling speed with no wind is 18 mph.
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3 years ago
Ratios equivalent to 4:8
Mrrafil [7]

Answer:

8:36

Step-by-step explanation:

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3 years ago
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