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Nadya [2.5K]
3 years ago
8

Solve for x. y=7x−7z−9

Mathematics
2 answers:
aleksandr82 [10.1K]3 years ago
6 0
You have to isolate the variable so you need to add 7z and 9 to both sides. You then get y+ 7z+ 9= 7x. Then divide 7x from both sides. The equation becomes x= y/7+ z + 9/7.
I hope this helps love! :)
AleksandrR [38]3 years ago
5 0

Answer:

The value of x is x=\frac{y+7z+9}{7}

Step-by-step explanation:

Consider the provided equation.  

y=7x-7z-9

We need to solve the equation for x.

Add 7z to both the sides.

y+7z=7x-7z+7z-9

y+7z=7x-9

Add 9 to both the sides.

y+7z+9=7x-9+9

y+7z+9=7x

Divide both sides by 7.

x=\frac{y+7z+9}{7}

Hence the value of x is x=\frac{y+7z+9}{7}.

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A ship at sea, the Gladstone, spots two other ships, the Norman and the Voyager, and measures the angle between them to be 48°.
ratelena [41]

Answer:

=3501 yards.

Step-by-step explanation:

The three ships form a triangle.  From the Voyager the angle between the Norman and the Gladstone=180-(55+48)=77°

Let the position of the Voyager be V that of Norman be N and that of the Gladstone be G

Then, the distance between Norman and voyager is g

g/sin G=v/ Sin V

4590/Sin 77=g/Sin 48

g=(4590 Sin 48)/Sin 77

=3500.8 yards

The distance between the Norman and the voyager= 3501 yards.

3 0
3 years ago
-4x+y= 6 <br>-5x-y=21 what is the answer​
bekas [8.4K]

Answer:

x=15

Step-by-step explanation:

21-6=15

-4x+y=-5x-y=15

x+y=-y=15

x=15

6 0
3 years ago
Initially, there were only 86 weeds in the garden. The weeds grew at a rate of 29% each week. The following function represents
Dmitry [639]

Answer:

Option A. f(x)=86[1.04]^{x} ; grows approximately at a rate of 0.4% daily

Step-by-step explanation:

we have

f(x)=86(1.29)^{x}

where

f(x) the number of weeds in the garden

x ----> the number of weeks

Calculate how quickly the weeds grow each day

Remember that a week is equal to seven days

so

f(x)=86(1.29)^{\frac{x}{7}}

Using the law of exponents

b^(x/a) = b^(x*(1/a)) = (b^(1/a))^x

so

f(x)=86[(1.29)^{\frac{1}{7}}]^{x}

f(x)=86[1.04]^{x}

therefore

The rate is approximately

1.04=1+r

r=1.04-1=0.04=4% daily

8 0
3 years ago
What’s the answer to this equation<br> 4x7=(__x5)+(4x2)
motikmotik

Answer:

4

Step-by-step explanation:

4X7 =28

4X2 =8

28-8 =20/5

=4

5 0
3 years ago
If 1⁄50 of an amount is 12, what is 1⁄20?
Alika [10]
You start by changing both the a common denominator, this case it would be 100 so it’s 2/100 and 5/100, since 1/50 and 2/100 is the same, each 1/100 is equal to “6” and you have 5/100, which is EQUAL TO 30
4 0
3 years ago
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