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Juli2301 [7.4K]
3 years ago
14

How do I solve this system of equations? -3x-4y-3z=-7 2x-6y+2z=3 5x-2y+5z=9

Mathematics
1 answer:
Rus_ich [418]3 years ago
7 0
For -3x-4y- 3z =-7
go on quick math and enter the equations and it'll give you answers and how to do it
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The ratio of boys to girls in a group is 7:3. If there are 40 more boys than girls, work out how many people there are in total.
LenaWriter [7]

Answer:

Step-by-step explanation:

7 - 3 = 4

7 + 3 = 10

4/10 = 40

10/10 = ?

10/10 x 40 x 10/4

= 100 people

7 0
3 years ago
Kenyon earns $105 for mowing 3 lawns. How much<br>would Kenyon earn for mowing 10 lawns?​
svp [43]

Answer:

$350

Step-by-step explanation:

3 lawns --------------> $105

find unit rate:

1 lawn -------------> $105 ÷ 3 = $35 per lawn

10 lawns --------> $35 per lawn x 10 lawns = $350

7 0
3 years ago
Read 2 more answers
does somebody knows how to do this one?
vlada-n [284]

Answer:

Step-by-step explanation:

To find the area subtract the area of the semicircle from the area of the rectangle.

Although the line isn’t there, if you imagine there is one, then you will see that you form a rectangle which is the same line as the semicircle’s diameter.

The area of rectangle is:

⇒ A = lw

⇒ A = (14)(8)

⇒ A = 112cm^{2}

The area of the semicircle;

⇒ A = \frac{1}{2}\pi r^{2}

⇒ A = \frac{1}{2}\pi (7)^{2}

*Note here that the radius is half the diameter, so it is 7cm, not 14cm

⇒ A = 76.97cm^{2}

Finally subtract the two areas;

⇒ A = 112 - 76.97

⇒ A = 35.03cm^{2}

6 0
2 years ago
What is 10.417 rounded to the nearest hundredth?
Zarrin [17]
10.417 rounded to the nearest hundredth is 10.42

Hope it helps!

7 0
4 years ago
Tom's weight = 500 pounds
ruslelena [56]

Answer:

88% of his weight remains

5 0
3 years ago
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