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Questions in mathematics

[Done] [tex]x^2+\frac{9}{x^2}-6[/tex]

[Done] The breaking strength of hockey stick shafts made of two different graphite-kevlar composites yields the following results (in Newtons): Composite 1: 525.3, 535, 534.7, 528.5, 525.4, 538, 522.2, 512.7, 524.4 Composite 2: 516.2, 553.9, 577.5, 576.9, 476.1, 509.7, 479.4, 478.9, 501.9, 582.6, 615.5, 523.9, 547.7 Can you conclude that the standard deviation of the breaking strength differs between the two composites? Use the α = 0.05 level of significance. State the null and alternate hypotheses: H0: σ1 = σ2 H1: σ1 ≠ σ2 This hypothesis test is a ______ test. Find the critical value. Round the answer to two decimal places. The critical value is 3.28 Compute the test statistic. Round the answer to two decimal places. F = 35.00 Determine whether to reject H0.

[Done] 1. 7 x 2 - (9 + 2) 2. (6 ÷ 3) x (11 - 4) 3. 9 x 3 + (120 - 181)

[Done] Compare: (i) (7+9) × 10 and 7+9 × 10 (ii) [(-4-(6)] × (-2) and (-4) - 6 × -7

[Done] What shape is being described? Write your answer. 1. A shape with no sides and no corners. 2. This shape has 2 pairs of equal sides and 4 corners. 3. A ______ has 3 sides and 3 corners. 4. A semi-circle is also called a ______. 5. A shape with 4 equal sides and 4 corners. 6. Half of a half circle is called a ______.

[Done] The table shows the number of tickets sold and the profit made at a fundraiser. | Tickets Sold | Profit | |---|---| | 2 | $ 18 | | 4 | $ 36 | | 6 | $ 54 | | 8 | $ 72 | Which describes the relationship between the number of tickets sold and the profit? A. Each ticket sold yields $8 of profit. B. Each ticket sold yields $9 of profit. C. Each ticket sold yields $16 of profit. D. Each ticket sold yields $18 of profit.

[Done] Anil deposited Rs 2,00,000 in a Bank at the rate of $10 \%$ p.a. compound. (a) Write the formula for finding quarterly compound interest. (b) If the bank provides the semi annual compound interest instead of the annual compound interest at the same rate of interest, how much more interest would be received by Anil? Find it.

[Done] \frac{(-2)^8 \cdot 5^3}{5^4 \cdot 2^{10} \cdot 10}

[Done] After being rearranged and simplified, which of the following equations could be solved using the quadratic formula? Check all that apply. A. [tex]$2 x^2+x^2+x=30$[/tex] B. [tex]$5 x+4=3 x^4-2$[/tex] C. [tex]$-x^2+4 x+7=-x^2-9$[/tex] D. [tex]$9 x+3 x^2=14+x-1$[/tex]

[Done] $5.125 - 0.080 = $ A) 0.045 B) 0.045 C) 5.044 D) 5.045