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3 years ago

Using additive inverse solve -2.5 - 1.5

Mathematics

1 answer:

lutik1710 [3]3 years ago

8 0

Answer:

-1

Step-by-step explanation:

change the subtraction symbol to addition and then add -2.5+1.5 and you'll get an answer of 1.

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If a half gallon of milk costs $1.24, what is the cost per pint?

snow_tiger [21]

$0.31 for each pint hope this helps

4 0

2 years ago

6/5 divided by 3/2 times 15/8 divided by 9/8

cricket20 [7]

Work to your question

4 0

2 years ago

Find all solutions to the equation. cos^2x + 2 cos x + 1 = 0

Black_prince [1.1K]

Answer:

x = pi, 3pi, 5pi etc

x = -pi, -3pi, -5pi etc

Step-by-step explanation:

cos^2 x + 2 cos x + 1 = 0

replace cos x with m

m^2 + 2m +1 = 0

solve by factoring (this is a^2 +2ab+b^2 = (a+b)^2 where a =m and b=1)

(m+1)^2=0

take the square root of each side

m+1 =0

m=-1

now replace m with cos x

cos x = -1

take arccos of each side

arccos cos x = arccos (-1)

x = pi, 3pi, 5pi etc

3 0

2 years ago

Tim looks up at the top of a tree at an angle of elevation of 40 degrees. If heis 5 ft tall and 10 ft from the tree, how tall is

dolphi86 [110]

<h2>Answer:</h2>

13.391 ft

<h2>Explanations:</h2>

The schematic diagram of the given question is shown below;

The height of the tree is expressed as:

H = h +5

Determine the value of h using the SOH CAH TOA identity

$\begin{gathered} tan\theta=\frac{opposite}{adjacent} \\ tan40^0=\frac{h}{10} \\ h=10tan40 \\ h=10(0.8391) \\ h=8.391ft \\ \end{gathered}$

Determine the height of the tree

$\begin{gathered} H=h+5 \\ H=8.391+5 \\ H=13.391ft \end{gathered}$

Hence the height of the tree is 13.391ft

3 0

6 months ago

It costs the school band SS dollars per sandwich that they make. The band sells each sandwich for 20\%20% more than it costs to

Annette [7]

Money Required for making 1 Sandwich that is Cost Price of 1 Sandwich = S Dollar

Selling Price of 1 Sandwich = 20 % more than Cost Price S

= S + 20 % of S

= $\frac{20S}{100}+S=\frac{120S}{100}$

=$ 1.20 S

= $(S + 0.20 S)

Selling Price of 73 Sandwiches = $ 73 (S + 0.20 S)

The expression $73(S+0.2 S) →→ Selling Price of 73 Sandwiches

5 0

3 years ago

Read 2 more answers