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4 years ago

How to find x please help

Mathematics

1 answer:

o-na [289]4 years ago

6 0

You know the adjacent and you need to find the opposite, so you would use tangent. Your equation would look like this; tan 26°= x/28. You would need to multiply both sides by 28 to simplify it to this; 28*tan 26°= x
Solving this, you would get an answer of 13.7

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A test has twenty questions worth 100 points. The test consists of True/False questions worth 3 points each and multiple choice

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3 years ago

Can some help me on these 2 plzzz

Ipatiy [6.2K]

Since the two boxes are identical, we know that both of the boxes are of equal weight. Since one box weighs 168 ounces, the other weighs 168 too. So we add them together..
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4 0

3 years ago

Factorise : a²+b²-c²+2ab

AleksAgata [21]

Answer:

Step-by-step explanation:

a²+b²-c²+2ab

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=(a+b)²-c²

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3 years ago

Write an expression that can be used to find 4x275 using mental math and properties of numbers

Reil [10]

4 x 200 + 4 x 70 + 4 x 5

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3 years ago

How do you do this question?

madam [21]

Answer:

Step-by-step explanation:

A left Riemann sum approximates a definite integral as:

$\int\limits^b_a {f(x)} \, dx \approx \sum\limits_{k=1}^{n}f(x_{k}) \Delta x \\where\ \Delta x = \frac{b-a}{n} \ and\ x_{k}=a+\Delta x \times (k-1)$

Here, the integral is ∫₀² 9ˣ dx, and the number of subintervals is n = 4.

So Δx = 2/n = 1/2, and x = 2(k−1)/n = (k−1)/2.

Plugging in:

∑₁⁴ 9^((k−1)/2) (1/2)

1/2 ∑₁⁴ 9^((k−1)/2)

1/2 (9^((1−1)/2) + 9^((2−1)/2) + 9^((3−1)/2) + 9^((4−1)/2))

1/2 (9^(0) + 9^(1/2) + 9^(1) + 9^(3/2))

1/2 (1 + 3 + 9 + 27)

8 0

3 years ago