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3 years ago

X + 4 + 3x = 72 Yall Know The Deal

Mathematics

1 answer:

Snezhnost [94]3 years ago

3 0

Answer:

x = 17

Step-by-step explanation:

Combine like terms first:

x + 3x + 4 = 72 --> 4x + 4 = 72

Isolate the variable by subtracting 4 from both sides so you get

4x = 72 - 4

4x = 68

Divide both sides by 4 to get

x = 68/4

x = 17

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What does 1- (-18)<br>don't get this at all...<br>please explain how you do negative numbers.

AysviL [449]

The two negatives cancel out, so it would just mean 1+18, which is 19.

5 0

4 years ago

Inverse notation f^-1 used In a pure mathematics problem is not always used when finding inverses of applied problems. Rather, t

solong [7]

Answer:

a) 75.4 kg

b) $h(W)=\frac{W+83}{2.2}$

Step-by-step explanation:

a) The ideal weight of a 6-foot (72 inches) male is given by simply applying h= 72 in to the expression:

$W(72) = 49+2.2(72-60)\\W(72) =75.4\ kg$

b) Expressing height as a function of weight:

$W(h)= 49+2.2(h-60)\\2.2h-132+49=W\\h(W)=\frac{W+83}{2.2}$

Verifying with W(h(W)):

$W(h(W))= 49+2.2(\frac{W+83}{2.2} -60)\\W(h(W))= 49-132+W+83\\W(h(W))=W$

Verifying with h(W(h):

$h(W(h))=\frac{(49+2.2(h-60))+83}{2.2}\\h(W(h))=\frac{(49+2.2h-132+83)}{2.2}\\h(W(h))=h$

8 0

3 years ago

What is the area of a rectangle that is 3.1 cm wide and 4.4 cm long? Enter the full-precision answer first to see the correspond

Brrunno [24]

Answer: Without rounding : 13.64 (square cm)

Rounded answer : 13.6(square cm)

Step-by-step explanation:

We know that the area of a rectangle is given by :-

$A=l\times w$ , where l is the length and w is the width of the rectangle.

Given : The dimensions of a rectangle are 3.1 cm wide and 4.4 cm long.

Then, the area of rectangle will be:-

$A=4.4\times 3.1=\dfrac{44}{10}\times\dfrac{31}{10}\\\\=\dfrac{1364}{100}=13.64\text{ cm}^2\approx13.6\ cm^2 \text{Rounded to the nearest tenth}$

Therefore, the area of rectangle = $13.6\text{ cm}^2$

3 0

4 years ago

Read 2 more answers

Gold chains sell for $2.50 per inch. How much did ryan spend for an 18-inch gold chain?

White raven [17]

The answer is 45 because 2.50 times 18=45

6 0

3 years ago

Read 2 more answers

EXPENSES: Camille has no more than $50.00 to spend each week for lunch and bus fare. Lunch costs $3.00 each day, and bus fare is

Afina-wow [57]

Answer:

Inequality: $3.00 L + 1.75B \leq 50$

She can afford to buy the lunch and bus rides

Step-by-step explanation:

Given

$Maximum\ Amount = \$50.00$

$Lunch = \$3.00$ daily

$Bus\ Fare = \$1.75$ daily

Solving (a) The inequality

Let bus ride be represented with B and Lunch be represented with L

If 1 bus ride costs $1.75, then

B bus ride would cost $1.75 * B

If 1 lunch costs $3.00, then

L lunch would cost $3.00 * L

Total Spending is then the sum of the above expression i.e.

$3.00 * L + $1.75 * B

The question says Camille can not spend more than $50.00.

This is represented by less than or equal to.

So, the expression is:

$3.00 * L + 1.75 * B \leq 50$

$3.00 L + 1.75B \leq 50$

Solving (b): Can she afford 7 lunch and 14 bus ride?

To do this, we simply substitute 7 for L and 14 for B

$3.00 * 7 + 1.75 * 14 \leq 50$

$21 + 24.5 \leq 50$

$45.5 \leq 50$

The above inequality is true.

<em>Hence, she can afford to buy the lunch and bus rides</em>

8 0

3 years ago