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3 years ago

14

4 (×+2) show step if you can

2 answers:

chubhunter [2.5K]3 years ago

5 0

I believe the answer is 4x + 8. you multiply 4 by x which makes 4x. Than you multiply 4 by 2, making 8.

Alona [7]3 years ago

3 0

This problem appears to be linked with the Distributive Property. The Distributive Property allows any outside number/variable of the parenthesis to multiply with all inside numbers/variables within the parenthesis.

For example:

2(1 + 3)
2(1) + 2(3)
2 + 6
8.

With our definition, rule, and example, we are ready to solve.

4(x + 2)
Multiply the outside number (4) by all inside numbers/variables (x + 2).
4(x) + 4(2)
4x + 8.
If this is not solving for x, this is your answer.

If we are solving for x, we need to get 4x by itself and then simplify if possible.

4x + 8 = 0
Remember, what you do to one side of the equation you must do to the other.
Subtract 8 from both sides.
4x = -8
Divide both sides by 4.

4x / 4 = x
-8 / 4 = -2
X = -2

Your answers are:

4x + 8 if simplifying the expression.
x = -2 if we are solving for x.

I hope this helps!

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6(a + 5) = 42<br><br> ...................................

Elan Coil [88]

It’s 2 if I did my math right because I did it 2 tones and both of the times I got 2

5 0

3 years ago

Can someone help me with this thanks

Ugo [173]

The length of the brace required is 4.3m

What is sine rule?

In a ΔABC a, b and c are the sides and A, B and C are angles then,

$\frac{a}{SinA}=\frac{b}{sinB}=\frac{c}{sinC}$

We can find the length, l as shown below:

Let AB=3m, BC=2m and AC=l

Let ∠A=25°

So, in ΔABC

$\frac{BC}{sinA}=\frac{AB}{sinC}=\frac{AC}{SinB}$

$\frac{BC}{sinA}=\frac{AB}{sinC}$

$\frac{2}{sin25}=\frac{3}{sinC}$

$\angle{C}=sin^{-1}(\frac{3\times sin25}{2} )$

∠C=39.34°

∠A+∠B+∠C=180°

∠B=180°-25°-39.34°

∠B=115.66°

$\frac{BC}{sinA}=\frac{AC}{SinB}$

$\frac{2}{sin25}=\frac{l}{sin(115.66)}$

$l=\frac{2\times sin(115.66)}{sin25}$

l=4.2659

Rounding to nearest tenth of meter.

l=4.3m

Hence, the length of the brace required is 4.3m

Learn more about Sine Rule here:

brainly.com/question/25852087

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8 0

1 year ago

Mina tosses two number cubes labeled 1 to 6. What is the probability that the sum is equal to five?

coldgirl [10]

(1,4)

(4,1)

(2,3)

(3,2)

so there are 4 different combinations that equal 5

6 x 6 = 36 total possible outcomes of the dice

so they have a 4/36 reduces to 1/9 probability of equaling 5

7 0

3 years ago

Write these as a decimal 0.5 0.7 0.33 0.875

EleoNora [17]

Fraction? They are already decimals

6 0

3 years ago

Element X decays radioactively with a half-life of eight minutes. If there are 800 g of element X, how long, to the nearest 10th

Harman [31]

Answer: 41.5 min

Step-by-step explanation:

This problem can be solved with the Radioactive Half Life Formula:

$A=A_{o}.2^{\frac{-t}{h}}$ (1)

Where:

$A=22 g$ is the final amount of the radioactive element

$A_{o}=800 g$ is the initial amount of the radioactive element

$t$ is the time elapsed

$h=8 min$ is the half life of the radioactive element

So, we need to substitute the given values and find $t$ from (1):

$22 g=(800 g) 2^{\frac{-t}{8 min}}$ (2)

$\frac{22 g}{800 g}=2^{\frac{-t}{8 min}}$ (3)

$\frac{11}{400}=2^{\frac{-t}{8 min}}$ (4)

Applying natural logarithm in both sides:

$ln(\frac{11}{400})=ln(2^{\frac{-t}{8 min}})$ (5)

$-3.593=-\frac{t}{8 min}ln(2)$ (6)

Clearing $t$ :

$t=41.46 min \approx 41.5 min$ This is the time elapsed

7 0

3 years ago