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4 years ago

What is the first step needed to solve 3 over 4 multiplied by x minus 3 equals negative 18 ? (1 point)

Mathematics

1 answer:

zhenek [66]4 years ago

8 0

Answer:

Divide both sides by 4

Step-by-step explanation:

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A blue whale, the largest mammal in the world, weighs 1.36 * 105 kilograms as an adult. An adult killer whale weighs about 4 * 1

sergejj [24]

Answer:

(1.36 × $10^{5}$ ) - (4 × $10^{3}$ ) = 132000kg

1.32 × $10^{5}$ kg = 1320000

7 0

3 years ago

To which subset does the following number belong? √7

marishachu [46]

Irrational numbers. √7 is an irrational number.

4 0

3 years ago

Anna enjoys having dinner at a restaurant in a town where the sales tax on meals is 10%. She leaves 15% tip before the sales tax

vitfil [10]

Answer:

The cost of her dinner without tax or tip is $22.

Step-by-step explanation:

Given:

Anna enjoys having dinner at a restaurant in a town where the sales tax on meals is 10%.

She leaves 15% tip before the sales tax is applied, and the tax is calculated on the pre-tip amount.

She spends a total of $27.50 on her dinner.

Now, to find the cost of her dinner without tax or tip.

Let the cost of dinner without tax or tip be $x.$

So, the tax is:

$10\%\ of\ x.$

$=\frac{10}{100} \times x$

$=0.10\times x$

$=0.10x.$

And, the tip is:

$15\%\ of \ x.$

$=\frac{15}{100} \times x$

$=0.15\times x$

$=0.15x.$

As given, she spends a total $27.50 on her dinner.

Now, to get the cost of her dinner without tax or tip:

$x+0.15x+0.10x=27.50$

$x+0.25x=27.50$

$1.25x=27.50$

Dividing both sides by 1.25 we get:

$x=22$

$x=\$22.$

Therefore, the cost of her dinner without tax or tip is $22.

5 0

3 years ago

Find the missing side

Firdavs [7]

$\huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}$

$\sin(55) = \frac{19}{x} \\ \frac{ \sqrt{3} }{2} = \frac{19}{x} \\ x = \frac{19 \times 2 \times \sqrt{3} }{3} \\ x = 21.9 = 22 \: \: \: cm$

8 0

3 years ago

A pair of equations is shown below: y = 7x - 8 y = 5x - 2 Part A: Explain how you will solve the pair of equations by substituti

yuradex [85]

So, first of all you have to identify the two equations which are: y=7x-8 and y=5x-2. after identifying the two equation you can choose one of them to start with. I chose the first one and I'll use substitution method, which means I'll pug in numbers in the unknown variables to find the value of x. Y=7x-8, I'll substitute the value of y in the equation that I chose and plug in the value of the second equation. Y=7x-8 --> 5x-2=7x-8 (this is our new equation). After that I'll combine like terms. -2+8=7x-5x --> 6=2x --> 6/2=x --> 3=x. So x=3 and that's the answer using substitution method. If the two points are graphed, they will intersect at the point (3,13). To see where the intersection of the line we can use a calculator to make it faster. So we plug in the points of the two lines in the calculator we graph and find the intersection point.

8 0

3 years ago