5272道题目5525 条题源记录 · 相同内容已合并
一元一次方程与代数求值进阶
If \( x+1=3 \), what is the value of \( 2(x+1) \) ?
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一元一次方程与代数求值挑战
\( 1.5c+3d=108 \)
The given equation describes the relationship between the number of cats, c, and the number of dogs, d, that can be cared for at a pet care business during a week. If the business cares for 36 dogs during a week, how many cats can it care for during this week?
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一元一次方程与代数求值挑战
\( 6\left(t+7\right)-8\left(t+7\right)=38 \)
What value of t is the solution to the given equation?
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一元一次方程与代数求值进阶
\( b-20=\frac{x}{y} \)
The given equation relates the positive numbers b, x , and y . Which equation correctly expresses x in terms of b and y ?
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一元一次方程与代数求值进阶
All the sidewalk paving stones in a neighborhood are rectangular. The length of each of these paving stones is 41 centimeters greater than the width. Which equation gives the area A, in square centimeters, of a sidewalk paving stone in terms of the width w , in centimeters, of that paving stone?
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一元一次方程与代数求值进阶
During hibernation, American black bears do not eat or replenish calories. A certain black bear weighed 338 pounds when entering hibernation and lost weight at a rate of 0.7 pound per day. At this rate, how many days after entering hibernation did the black bear weigh 310 pounds?
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一元一次方程与代数求值挑战
If \( \frac{x+5}{3}=\frac{x+5}{12} \), the value of \( x+5 \) is between which of the following pairs of values?
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一元一次方程与代数求值挑战
\( 32x+81y=290 \)
The given equation represents the volume of mulch x, in cubic feet, and the volume of soil y, in cubic feet, in a mixture of mulch and soil that weighs 290 pounds. If the volume of soil in the mixture is 2 cubic feet, what is the volume of mulch in the mixture, in cubic feet?
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一元一次方程与代数求值进阶
If \( \frac{x}{y}=64 \) and \( \frac{cx}{4y}=64 \), what is the value of c?
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一元一次方程与代数求值进阶
If \( 7\left(6-9x\right)+4=6\left(6-9x\right)+19 \), what is the value of \( 6−9x \)?
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一元一次方程与代数求值进阶
\( \frac{j}{5}=k+9m \)
The given equation relates the distinct positive numbers j, k, and m. Which equation correctly expresses j in terms of k and m?
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一元一次方程与代数求值进阶
If \( 5+x=2 \), what is the value of \( −15−3x^2 \) ?
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