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2 years ago

Mary has scored 99, 83, 74, and 69 on her previous four tests. What score does she need on her next test so that her average

Mathematics

1 answer:

Gemiola [76]2 years ago

5 0

Answer:

Step-by-step explanation:

mean = the sum of the value / the number of the value

when we calculate the some must be 385 so the sum of the given value gives 319 so to reach the average 77 she must score 66

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Convert this equation to standard form: y=1/2x + 2/3

dsp73

The answer would be,
$- \frac{1}{2}x + y = \frac{2}{3}$
Hope this helped
:D

7 0

3 years ago

1. Now consider equations of the form , where a, b, and c are all positive integers and . (a) Create an equation of this form th

tino4ka555 [31]

a) To create an equation

X+X =7

so what's X over here is

7² = x²

X=3.5

b) Real numbers are mixture of irrational and rational numbers so √5 and √6 are irrational where as 5 and 6 are not but they two are equal to each other.

Explaining the equation:

√5 +√6 = √11

5 +6 = 11

√11 =11

√= 11 ÷ 11

√= 1

So if root is 1 then -1 is -√

this is the answer propably

4 0

3 years ago

A contractor is hired to build an apartment complex. Each 840-square-foot unit has a bedroom, kitchen, and bathroom. The bedroom

Dennis_Churaev [7]

Answer:

350 sq ft

Step-by-step explanation:

Given that:

840 sq ft area has a bedroom, kitchen and bathroom.

Let the area of bedroom be $x$ sq ft.

Then the area of kitchen will also be $x$ sq ft.

Let the area of bathroom be $y$ sq ft.

As per question statement:

$x+y+x=840\\\Rightarrow 2x+y=840 ...... (1)$

Tiles ordered to cover two kitchens and two bathrooms is 980 sq ft.

i.e.

$2x+2y=980 ..... (2)$

Subtracting equation (1) from (2):

i.e. (2) - (1):

$y = 140$ sq ft

Putting the value of $y$ in (1):

$2x+140=840\\\Rightarrow 2x =700\\\Rightarrow \bold{x=350\ sq\ ft}$

Therefore, the carpet needed for each bedroom = <em>350 sq ft</em>

8 0

3 years ago

A submarine descends at a rate of 2.6 kilometers per hour.

kotegsom [21]

Answer:

6.24/2.6 = 0.24

0.2 is the answer

Step-by-step explanation:

3 0

3 years ago

Please can someone help me out with this- I’m really stuck on this problem and I can’t get off of it cause I failed it to much :

Mashcka [7]

I think it might be 56y^2 but I could be wrong

7 0

3 years ago