Ask question

Ask question

All categories

3 years ago

8

A student answered 86 problems on a test correctly and received a grade 78%, how many problems were on the test, if all the prob

lems were worth the same number of points

1 answer:

malfutka [58]3 years ago

8 0

86:x=78:100
78x=8600
x=110

You might be interested in

Michal yard is 320 acres if he mowed 2/5 of his yard on friday how many acres does he have left to mow on saturday P.S you get 2

77julia77 [94]

I92 because that is how many archers he has left for the next day.

5 0

3 years ago

Read 2 more answers

My basketball team plays four games per week. During the first four weeks, we lost all 16 of our games. During week 5, we won th

riadik2000 [5.3K]

Answer:

You need 30 total weeks to win at least 65% games

Step-by-step explanation:

Team have played = 20 games

Number of winning games = 3

Let x represents the number of additional weeks.

You have won 3 games per week. Therefore you will win 3x additional games.

We know that 65% = 0.65

Therefore,

3+3x/20+4x = 0.65

By cross multiplication:

3+3x= 0.65(20+4x)

3+3x = 13+2.6x

Combine the like terms:

3x-2.6x = 13-3

0.4x=10

4x/10 =10

4x = 10*10

4x=100

Divide both sides by 4

4x/4 = 100/4

x = 25

since you have already played 5 weeks...you need to play 25+5 = 30 weeks.

Therefore you need 30 total weeks to win at least 65% games....

4 0

3 years ago

How do you solve this ? what do you do with the exponets ?

antiseptic1488 [7]

4/7 is the answer.

I cant reall explain becuase it will take forever xD

6 0

3 years ago

Read 2 more answers

REALLY APPRECIATE YOUR HELP<br><br>Given log x = 3 and log y = 2, prove that x^2 -7xy =3000y

anyanavicka [17]

Answer:

$if \: log(x ) = 3 \\ log_{10}(x) = 3 \\ {10}^{3} = x \\ therfore \to \: \boxed{x = {10}^{3} } \\ \\ if \: log(y ) = 2 \\ log_{10}(y) = 2 \\ {10}^{2} = y \\ therfore \to \: \boxed{y= {10}^{2} }$

Step-by-step explanation:

$x^2 -7xy =3000y \: then \to \\ x^2 =3000y + 7xy \\ {(10 ^{3} )}^{2} = 3000(10)^{2} + 7( {10}^{3} \times {10}^{2}) \\ {10}^{6} = 3000(10)^{2} + 7( {10}^{3} \times {10}^{2}) \\ {10}^{6} = 3000(10)^{2} + 7( {10}^{5} ) \\ {10}^{6} = 300000 + 700000 \\ \boxed{{10}^{6} = 1000000} \\ hence \: the \: equation \to \: x^2 -7xy =3000y \\ \boxed{ is \: corret}$

♨Rage♨

3 0

3 years ago

Find the measure of the third angle of a triangle if the measures of the other two angles are given.

tamaranim1 [39]

Answer:

36.7

Step-by-step explanation:

180 - 102.9 - 40.4= 36.7

4 0

4 years ago

Read 2 more answers