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3 years ago

If - 7 = 9 + x, then -3x + 5 = ?

Mathematics

1 answer:

Vikentia [17]3 years ago

8 0

Answer:

Step-by-step explanation:

At first,

- 7 = 9 + x

By subtracting 9 from both sides, we get

-7-9=9+x-9

-16=x

Now,

By substituting the value of x in -3x + 5 , we get

-3x + 5

-3×(-16)+5

48+5

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Here is a set of four number cards.

s2008m [1.1K]

Answer:b

Step-by-step explanation:

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3 years ago

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A factory manufactures pipes that should have an ideal length, represented by 0 on the number line. The quality manager at the f

LenKa [72]

Answer:

The value of Y is either 0.8 cm less than the ideal length or 0.4 cm more than the ideal length.

Y = - 0.8 cm or Y = +0.4 cm

Step-by-step explanation:

ideal length = 0

X = - 0.2 cm

|X - Y| = 0.6 cm

X - Y = 0.6 or X - Y = - 0.6

X - Y = 0.6

-0.2 - Y = 0.6

-Y = 0.6 + 0.2

Y = -0.8 cm

X - Y = -0.6

-0.2 - Y = -0.6

-Y = -0.6+0.2 = -0.4

Y = 0.4 cm

The plot of the possible points on the number line that Y could be, is attached to this solution.

It is evident that the value of Y is either 0.8 cm less than the ideal length or 0.4 cm more than the ideal length.

Hope this Helps!!!

7 0

4 years ago

How do you solve...0=-5t^2+20t+1

-Dominant- [34]

There were 2 solutions that i came up with. Here is the first one. I rearranged the eqaution by subtracting what is to the right of thr equal sign. Multiply the coefficeint of the first term by the constant 5 x (-1)= -5. Then you would find 2 factors of -5 whose sum equals the coefficient of the middle term which is 20. -5+1= -4 and -1+5=4. the eqaution then comes to 5t^2-20t-1=0. you would solve 5t^2-20t-1=0. you would divide both sides of the equal sign by 5. t^-4t-1/5=0. then t^2-4t=1/5. add 4 to both sides of the equation. so we get 21/5+ 4 + 4t -t^2=21/5. it then comes out to be t^2-4t+t=t-2^2. according to the law of transitivity it is t-2^2=21/5.

t =(20+√420)/10=2+1/5√<span> 105 </span><span>= 4.049 </span>.

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3 years ago

Type the numerical coefficient of 6xy ???

sergey [27]

The coefficient of 6xy is 6 because the number is a coefficient, the xy are the variables.

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3 years ago

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Use the percent formula, A=PB: A is P percent of B, to solve the problem.

Reika [66]

Given parameters:

Percent formula;

A = PB

P is the percentage

B is the quantity

From the expression,

A is the unknown

P = 4%

B = 600

Now input the known parameters and solve;

A = $\frac{4}{100}$ x 600

A = 4 x 6 = 24

So, 4% of 600 is 24

5 0

4 years ago