4 years ago

When 4 times the number X is added to 12, the result is 8. What number results when two times x is that at 7?

Mathematics

1 answer:

kow [346]4 years ago

8 0

I think you worded that a little wrong

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If DH = (4x + 10) in. and HI = (2x − 4) in., then x =_______ , HI =_______ , and ID = _________

Blizzard [7]

Answer:

x = ∞ infinite solutions or 0

HI = infinite solutions

ID = infinite solutions.

Step-by-step explanation:

Oh okay I got this now!

ID + HI = DH

ID + 2x - 4 = 4x + 10 (subtract 2x on both sides)

ID - 4 = 2x + 10 (add 4 on both sides)

ID = 2x + 14

So now ID + HI = DH

2x + 14 + 2x - 4 = 4x + 10 (simplify)

4x + 10 = 4x + 10 (subtract 10 on both sides)

4x = 4x (minus 4x on both sides)

0 = 0

I would plug in 0 as x.

Hope this helps!

8 0

3 years ago

Please help me and ill mark brainlst and explainn

Harlamova29_29 [7]

Answer:

30yd^2

hope this helps!!:)

Step-by-step explanation:

3 0

3 years ago

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A radioactive substance decays according to the following function, where yo is the initial amount present, and y is the amount

Irina18 [472]

Answer:

$t_{1/2} \approx 9.6\,days$

Step-by-step explanation:

The time constant of the radioactive constant is:

$\tau = \frac{1}{0.072}\,days$

$\tau = 13.889\,days$

The half-life of the substance is:

$t_{1/2} = \tau \cdot \ln 2$

$t_{1/2} = (13.889\,days)\cdot \ln 2$

$t_{1/2} \approx 9.6\,days$

7 0

4 years ago

Write the equation of the line in y=Mx+b from (0,0), (10,2)

Nana76 [90]

Gradient, m=(2-0)/(10-0)=1/5
At (10,2), 2=1/5(10)+b
b=0
Equation: y=1/5 x
Hope this can help.

6 0

3 years ago

5/7y = 6, giving brainliest

garri49 [273]

7/5 * 5/7y = 7/5 * 6

y = 42/5.

The multiplication property of equality is used.

6 0

3 years ago

Read 2 more answers