Answer:
Step-by-step explanation:
Let T stand for the number of 2 point questions and F for the number of 4 point questions.
We are told that:
2T + 4F = 100 {The total score is the sum of 2 and 4 point questions times their point values]
and that
T + F = 35 [the total number of questions is 35]
Rearrange the last equation to solve for either T or F, and substitute that into the first equation:
T = 35 - F
--
2T + 4F = 100
2(35-F) + 4F = 100
70 - 2F +4F = 100
2F = 30
F = 15
Since T + F = 35, T = 20
Check:
2-Point Questions: 20*2 = 40
4-Point Questions: 15*4 = 60
Total test is 100 points
Answer:
x = 1.155
x = -1.155
Step-by-step explanation:
4x² = x² + 4
<h3><u>i</u><u>)</u><u> </u><u>move</u><u> </u><u>variable</u><u> </u><u>to</u><u> </u><u>the</u><u> </u><u>left-</u><u>hand</u><u> side</u><u> </u><u>and</u><u> </u><u>change</u><u> its</u><u> sign</u></h3>
4x² - x² = 4
<h3><u>ii</u><u>)</u><u> </u><u>colle</u><u>ct</u><u> like</u><u> terms</u></h3>
3x² = 4
<h3><u>iii</u><u>)</u><u> </u><u>divi</u><u>de</u><u> both</u><u> sides</u><u> of</u><u> the</u><u> equation</u><u> </u><u>by</u><u> </u><u>3</u></h3>
<u>
</u>

<h3><u>iv</u><u>)</u><u> </u><u>take the square root to the opposite side of the equation and remember to use </u></h3><h3><u>positive</u><u> and negative </u><u>roots</u></h3>
<u>
</u>
<h3><u>v</u><u>)</u><u> </u><u>the</u><u> </u><u>equation</u><u> </u><u>has</u><u> </u><u>two</u><u> </u><u>solu</u><u>tions</u><u>.</u><u> </u><u>write</u><u> </u><u>the</u><u> </u><u>solutions</u><u>,</u><u> </u><u>one</u><u> </u><u>with</u><u> </u><u>a</u><u> </u><u>'</u><u>+</u><u>'</u><u> </u><u>sign</u><u> </u><u>and</u><u> </u><u>anothe</u><u>r</u><u> </u><u>with</u><u> </u><u>a</u><u> </u><u>'</u><u>-</u><u>'</u><u> </u><u>sign</u></h3>


<h3 />
Answer:
<h3>x = 4</h3>
Step-by-step explanation:
102 + 102 + 24x + 24x - 18 - 18 = 360
204 + 48x - 36 = 360
204 + 48x = 360 + 36
204 + 48x = 396
48x = 396 - 204
48x = 192
x = 192/48
x = 4
Answer:
32 meters
Step-by-step explanation:
<u>The question is on scale</u>
Length of house on paper=100cm
Length of house actual=40m
<u>finding the scale used;</u>
make both lengths with similar units;
100cm rep 40m
100cm = 40×100 cm
100cm=4000cm
<em>1:40⇒1cm rep 40 cm</em>
<u>Finding actual measurement of the width</u>
1cm rep 40cm
80cm rep ?
cross multiply; (80×40)÷1= 3200cm
actual width=3200/100= 32 meters
Answer:
Step-by-step explanation: your answer is {0,0} {0,0}