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3 years ago

the next Science test will have 50 questions.How many questions does Julia need to answer correctly to recieve a score of 90%

2 answers:

5 0

She will have to answer 45 questions right because if you multiply 50×.90. You will get 45, so she can only get 5 questions wrong.

Katarina [22]3 years ago

3 0

Julie will need to answer 45 questions correctly to receive a score of 90%

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The total number of restaurant purchased meals that the average person will eat in a restaurant, and a car, or at home in a year

Andrei [34K]

Answer:

80 restaurant purchased meals are eaten in a restaurant

31 meals are eaten in a car

60 meals are eaten at home

Step-by-step explanation:

Let us suppose r be the total number of meals eaten in a restaurant

Let us suppose c be the total number of meals eaten in a car

Let us suppose h be the total number of meals eaten in a home

The total number of meals eaten in a restaurant, in a car or at home is given as 163. Hence, $r + c + h = 171.....[A]$
The total number meals eaten in a car or at home exceeds the number eaten in a restaurant by 11. Hence, $c + h = r + 11.....[B]$
Twenty more restaurant-purchased meals will be eaten in a restaurant than at home. Hence, $r = h + 20.....[C]$

Substituting Equation [B] into [A],

$r + c + h = 171.....[A]$

$r + r + 11 = 171$

$2r + 11 = 171$

$2r = 160$

$r = 80$

Putting $r = 80$ in $r = h + 20.....[C]$

$80 = h + 20$

$h = 60$

Putting $r = 80$ and $h = 60$ in $r + c + h = 171.....[A]$

$80 + c + 60 = 171$

$c = 171 - 60 - 80$

$c = 31$

Therefore,

80 restaurant purchased meals are eaten in a restaurant

31 meals are eaten in a car

60 meals are eaten at home

Verification:

$r + c + h = 171$

Putting $r = 80$ , $c = 31$ and $h = 60$ in $r + c + h = 171$

$80 + 31 + 60 = 171$

$171 = 171$

<em>Keywords: number, equation</em>

<em>Learn more word problem from brainly.com/question/11920172</em>

#learnwithBrainly

5 0

3 years ago

How much do you have to add to 3/2 to make it equal to the sum of 11/5 and 4 1/2?

nordsb [41]

Step-by-step explanation:

sum is addition

3/2+x=11/5+4 1/2

get x alone by using opposite operation to get 3/2 on other side of equal sign

3/2 is being added to x, so the opposite is subtracting

3/2-3/2+x=11/5+4 1/2-3/2

3/2 cancels out on the left

x=11/5+4 1/2-3/2

need same denominator, all denominators are factors of 10

2×5

multiply top and bottom of each fraction to get denominator of 10

(11/5)*(2/2)

(4/1)*(10/10) and (1/2)*(5/5)

(3/2)*(5/5)

multiply top and bottom and add

x=(22/10)+(4/10)+(5/10)-(15/10)

add all numerators

x=(22+4+5-15)/10

x=16/10

now simplifydivide by 2 on top and bottom

x=(16/10)÷(2/2)

x=8÷5

5/5 is 1, and there is 3/5 left

so x=1 3/5

3 0

2 years ago

What is the fraction of 2 1/4

icang [17]

Answer:

9/4

Step-by-step explanation:

2 1/4 = 9/4 From mixed fraction to an improper fraction: "the numerator of the improper fraction" = "denominator" xx "the whole number" + "the numerator of the mixed fraction" The denominator remains as it is. So 2 1/4 = (4 xx 2 + 1)/4 = 9/4

3 0

3 years ago

Read 2 more answers

PLZZZ HELLP 3+7 − 1/2 is an example of

notsponge [240]

Answer:

C. a numerical expression.

Step-by-step explanation:

Right away, what you should know is that this is an expression. Equations are expressions, except wiht an equal sign. This is not algabraeic though, since there is no valuable (for example 3x, or 7a). So, through the process of elimination, the answer would be a numerical expression.

Hope this helps!

4 0

3 years ago

Which is bigger 1.75 yards or 42 inches

igor_vitrenko [27]

The answer is 1.75 yards, which equals to 63 inches compared to 42.

7 0

4 years ago