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Nana76 [90]
3 years ago
9

Who helped / guide you in answer your module?​

Mathematics
1 answer:
Svet_ta [14]3 years ago
3 0
Please explain more and I would answer!!!
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Plzzzzzz help meeeee​
kipiarov [429]

Answer:

Step-by-step explanation:

For A, 7x=21, it is asking, 7 multiplied by what number is 21? We can try to figure it out. Let's start with 0.

7(0)≠21

Then 1.

7(1)≠21

7(2)≠21

7(3)=21

Therefore, for question a, the answer is 3.

For question b, it's asking 6 minus what is 2.

With this one, we can say it is 4, since 6-4=2.

Now moving on to B.

a) 2x+4=16

We need to isolate x in order to find it's value.

So we can begin with subtracting 4 from both sides, getting us:

2x=12

Then, if we divide both terms by 2, we get x.

x=12/2

x=6.

b)

3 x (z/4)=9

Again, we need to isolate z.

So, we multiply both sides by 4, getting us

3z=36

then we divide by 3

z=36/3

z=12

c) 16-x=2

Here we simply subtract 16 from each side, then flip the signs to get positive x.

So, 16-x=2

-x=-14

x=14

d) 4k=20

This is essentially asking, 4 times what number is 20?

So we can divide both sides by 4 and get

k=20/4

k=5

5 0
3 years ago
143=7+8(3-7x) solve and justify
Llana [10]
Justify means plug answer in and verify

so distribute 8(3-7x)=24-56x

143=7+24-56x
143=31-56x
minus 31 both sides
112=-56x
divide both sides by -56
-2=x

justify

plug it back
143=7+8(3-7x)
143=7+8(3-7(-2))
143=7+8(3-(-14))
143=7+8(3+14)
143=7+8(17)
143=7+136
143=143

true

x=-2

7 0
3 years ago
A roller coaster begins at 90 feet above ground level. Then it descends 105 feet. Find the height of the coaster after the first
shepuryov [24]
It’s D 90-105 is -15
3 0
2 years ago
Solve for x 1.6 equals 12.8​
xenn [34]

Answer: x=14.4

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Michelle plans on raising $80 for her softball team. To raise the money, she is selling team shirts for $10 each.
8_murik_8 [283]

Given:

Michelle plans on raising $80.

Selling price of each shirt = $10

So far she has raised $20.

To find:

The number of more shirts she needs to sell.

Solution:

Let x be the number of more shirts she needs to sell.

Selling price of one shirt = $10

Selling price of x shirt = $10x

Total raising amount = $(10x + 20)

Michelle plans on raising $80. So,

10x+20=80

Subtract both sides by 20.

10x=80-20

10x=60

Divide both sides by 10.

x=\dfrac{60}{10}

x=6

So, the required equation is 10x+20=80

Therefore, the correct option is A.

6 0
2 years ago
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