Expression of a variable from the formula + subtraction - math problems

Number of problems found: 23

  • Two expressions
    When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y?
  • Spruce
    A massive storm broke the top of a fifteen-meter spruce so that it remained hanging along the rest of its trunk. The distance of this hanging top from the ground was 4.6 m. At what height was the spruce trunk broken?
  • Ralph
    Ralph has three bulldogs. One weighs 16 1/4 kilos, the other 12 3/5. If the total weight of the three dogs is 45 10/20. What is the weight of the third dog?
  • When 5
    When 5 is subtracted from both my numerator and denominator I become 3/4. What fraction i am?
  • Original price p
    If the original price of a table is p and the sales price of the table is p-0.3p, which other expressions represents the sale price of the table? Calculate also for p=100 USD
  • The two
    The two angles of a triangle are 78° and 82°. So what is the measure of the remaining third angle?
  • Profit, revenue, cost
    Profit, P(x), is the difference between revenue, R(x), and cost, C(x), so P(x) = R(x) - C(x). Which expression represents P(x), if R(x) = 3x3 + 2x - 1 and C(x) = x4 - x2 + 2x + 3?
  • Metal washers
    Metal washers with a diameter of 80 mm are cut from a strip of steel sheet with a width of 10 cm and a length of 2 m. Calculate the percentage of material waste if no material is lost when two adjacent circles meet.
  • Linear combination of complex
    If z1=5+3i and z2=4-2i, write the following in the form a+bi a) 4z1+6z2 b) z1*z2
  • Cube-shaped container
    The cube-shaped container has a height of 52 cm and a square base. The container was filled to the brim with water, then we immersed a metal cube in it, which caused 2.7 l of water to flow out of the container. After removing the cube from the water, the
  • Extending square garden
    Mrs. Petrová's garden had the shape of a square with a side length of 15 m. After its enlargement by 64 m2 (square), it had the shape of a square again. How many meters has the length of each side of the garden been extended?
  • Square and circles
    The square in the picture has a side length of a = 20 cm. Circular arcs have centers at the vertices of the square. Calculate the areas of the colored unit. Express area using side a.
  • Dodecagon
    Calculate the size of the smaller of the angles determined by lines A1 A4 and A2 A10 in the regular dodecagon A1A2A3. .. A12. Express the result in degrees.
  • A number 2
    A number decreased by the difference between four and the number.
  • Balloon and bridge
    From the balloon, which is 92 m above the bridge, one end of the bridge is seen at a depth angle of 37° and the second end at depth angle 30° 30 '. Calculate the length of the bridge.
  • Which
    Which decimals when subtracted equal 3.89: a - b = 3.89
  • Two chords
    In a circle with a radius of 8.5 cm, two parallel chords are constructed, the lengths of which are 9 cm and 12 cm. Find the distance of the chords in a circle.
  • The coil
    How many ropes (the diameter 8 mm) fit on the coil (threads are wrapped close together) The coil has dimension: the inner diameter 400mm, the outside diameter 800mm and the length of the coil is 470mm
  • Two annuluses
    The area of the annular circle formed by two circles with a common center is 100 cm2. The radius of the outer circle is equal to twice the radius of the inner circle. Determine the outside circle radius in centimeters.
  • Tripled square
    If you tripled the length of the sides of the square ABCD you increases its content by 200 cm2. How long is the side of the square ABCD?

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Expression of a variable from the formula - math problems. Subtraction Problems.