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Questions in Grade High-school

[Done] Q6. Rahim found three old chemical bottles in the storeroom of his house. He wants to test whether these chemicals are acidic, basic or neutral. Which of the following indicators should he use to test the chemicals? (a) Beetroot juice (b) Turmeric strip (c) Vanilla essence (d) China rose

[Done] Given the equation $3 x^2-7 x-1=0$, find $\alpha-\beta$.

[Done] Read the excerpt from The Odyssey. "but Cyclops went on filling up his belly with manflesh and great gulps of whey, then lay down like a mast among his sheep." What two unlike elements are being compared in this simile? A. the Cyclops and the mast of a ship B. the Cyclops' belly and his sheep C. manflesh and gulps of whey D. a mast and a flock of sheep

[Done] Ammonia, [tex]$NH _3(\Delta H_1=-45.9 kJ)$[/tex], reacts with oxygen to produce water [tex]$\left(\Delta H_1=-241.8 kJ\right)$[/tex] and nitric oxide, [tex]$NO \left(\Delta H_1=\right.$ 91.3 kJ )[/tex], in the following reaction: [tex]$4 NH_3(g)+5 O_2(g) \rightarrow 6 H_2 O(g)+4 NO(g)$[/tex] What is the enthalpy change for this reaction? Use [tex]$\Delta H_{\text {rxn }}=\sum\left(\Delta H_{\text {t, products }}\right)-\sum\left(\Delta H_{\text {f, reactants }}\right)$[/tex]. A. -902 kJ B. -104.6 kJ C. 104.6 kJ D. 900.8 kJ

[Done] Each month, Kaisorn deposits $50.00 onto her public transportation card. It costs her $2.50 per trip to ride the subway. Thom deposits $40.00 on his public transportation card. It costs him $2.00 per trip to ride the subway. If [tex]$x$[/tex] represents the number of trips and [tex]$y$[/tex] represents the amount remaining in each account, which system of equations represents their transportation costs? [tex] \begin{array}{l} 50-2.5 x=y \\ 40-2 x=y \end{array} [/tex] [tex]$50+2.5 x=y$ $40+2 x=y$ [/tex] [tex]$50-2.5 y=x$ $40-2 y=x$ [/tex] [tex]$50+2.5 y=x$ $40+2 y=x$ [/tex]

[Done] A homeowner has an octagonal gazebo inside a circular area. Each vertex of the gazebo lies on the circumference of the circular area. The area that is inside the circle, but outside the gazebo, requires mulch. This area is represented by the function [tex]$m(x)$[/tex], where [tex]$x$[/tex] is the length of the radius of the circle in feet. The homeowner estimates that he will pay [tex]$\$1.50$[/tex] per square foot of mulch. This cost is represented by the function [tex]$g(m)$[/tex], where [tex]$m$[/tex] is the area requiring mulch. [tex]$\begin{array}{l} m(x)=8 x^2-2 \sqrt{2} x^2 \\ g(m)=1.50 m \end{array}$[/tex] Which expression represents the cost of the mulch based on the radius of the circle? A. [tex]$1.50\left(\pi x^2-2 \sqrt{2} x^2\right)$[/tex] B. [tex]$\pi(1.50 x)^2-2 \sqrt{2} x^2$[/tex] C. [tex]$1.50\left(\pi x^2-2 \sqrt{2} x^2\right)$[/tex] D. [tex]$1.50\left(\pi(1.50 x)^2-2 \sqrt{2}(1.50 x)^2\right)$[/tex]

[Done] Fill in the blanks: 1. The period following the collapse of the Mycenaean civilization is known as the __________. 2. The __________ government consisted of elected citizens. 3. The __________ government was ruled by a council of three __________ archon eponymous, polemarch and archon basileus.

[Done] There are two boats..... the sea. A) on B) For C) at D) with Make up a sentence from the following list of words. 1 puts 2 Santa 3 tree 4 under 5 Claus 6 presents 7 the Christmas 8 our A) 2, 5, 6, 1, 7, 4, 8, 3 B) 2, 5, 1, 8, 6, 4, 7, 3 C) 4, 7, 3, 8, 2, 5, 1, 6 D) 2, 5, 1, 8, 4, 6, 7, 3 Choose the correct variant. 1 school 2 shop 3 bakery a. Where we study b. Where we buy food c. Where we buy bread A) 1-a, 2-b, 3-c B) 1-c, 2-a, 3-b C) 1-b, 2-c, 3-a D) 1-a, 2-c, 3-b

[Done] In the context of supply, what does ceteris paribus mean? A) Prices and quantity supplied are equal B) All other factors are held constant C) Supply equals demand D) Other factors vary with supply

[Done] Which statement about the balance sheet is true? a. It shows your net income or net loss over a specific period. b. It lists your regular earnings and any additional income sources. c. It provides a snapshot of your financial position at a specific point in time, listing assets, liabilities, and equity. d. It details the movement of cash in and out of your accounts over a period.