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lara [203]
4 years ago
12

Martin's average score after 4 tests is 89. What score on the 5th test would bring Martin's average up to exactly 90?

Mathematics
2 answers:
krok68 [10]4 years ago
6 0

Answer:

104

Step-by-step explanation:

89x4=356 90x5=450

450=356=104

never [62]4 years ago
6 0

Answer:

94

Step-by-step explanation:

((89x4)+94) divided by 5 = 90

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Write the following as an expression: How much water do I need to add to l liters of pure alcohol to obtain a solution of 45% al
vredina [299]

Answer:

see below

Step-by-step explanation:

amount of water w

l liter of pure alcohol = 100% alcohol

solution is 45 % percent alcohol

total amount of fluid is w+l

(w+l)( .45) = l*.100

Distribute

.45w  + .45 l = 1l

.45 w = 1l - .45l

.45 w = .55l

w = .55l / .45

w =11/9 l

3 0
3 years ago
Pls help me fast ASAP
cricket20 [7]
Since x=-4 and f(x) =x^3 when - 5<=x<=2,
f(-4)= -64

8 0
3 years ago
PLEASE HELP ME I REALLY NEED IT
topjm [15]

Answer: 170

Step-by-step explanation: Angle G and Angle H are consecutive angles, meaning they both add up to 180 degrees. Thus, if 10 is the value of Angle G, Angle H must be 170.

7 0
3 years ago
-5/4-(-1/6) help please
tiny-mole [99]
A way to add fractions that always works is to multiply each numerator by the denominator of the other, then express the sum of products over the product of the denominators.
\dfrac{a}{b}+\dfrac{c}{d}=\dfrac{a}{b}\cdot\dfrac{d}{d}+\dfrac{c}{d}\cdot\dfrac{b}{b}\\\\=\dfrac{ad+bc}{bd}

Here, you have
\dfrac{-5}{4}-\dfrac{-1}{6}=\dfrac{-5\cdot6-(-1)\cdot4}{4\cdot6}=\dfrac{-26}{24}\\\\=\dfrac{-13}{12}=-1\frac{1}{12}

The sum is -1 1/12
3 0
3 years ago
Can someone please help me with this (it says I have to choose more than 1 answers)
Brrunno [24]

Answer:

B & C

Step-by-step explanation:

Since x is greater than 38, 40 and 120 matches the condition.

Hope u understand.

Please mark as the brainliest

7 0
3 years ago
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