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nordsb [41]
3 years ago
9

Which of the following are mathematical sentences? Check all that apply.

Mathematics
2 answers:
zepelin [54]3 years ago
6 0
C,d,e i think and hope this could help you
shutvik [7]3 years ago
6 0

A and F are not math'l sentences; they're just numbers.

B, C, D and E all comment on the equality of two sides of given equations and are thus math'l sentences. For example: "10 times some number r equals 40."

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HURRY PLS!! TEST!!!!
stich3 [128]

Answer:

y=-5x+19

Step-by-step explanation:

yeah -ya...... right?

5 0
1 year ago
What does 7m- m equal
Norma-Jean [14]
7m-m\rightarrow7m-1m=m(7-1)\rightarrow6m

7m-m is equal to 6m.

4 0
1 year ago
James spent $(2y2 + 6). He bought notebooks that each cost $(y2 − 1).
CaHeK987 [17]
The expression to find the number of notebooks James bought would be written as:

Number of notebooks = total spent / cost per item

Number of notebooks = (2y^2 + 6) / <span>(y^2 − 1)

</span><span>If y = 3, then the number of notebooks bought would be:

</span>Number of notebooks = (2y^2 + 6) / (y^2 − 1)
Number of notebooks = (2(3)^2 + 6) / (3^2 − 1)
Number of notebooks = 3 pieces<span>
</span><span>
</span>
7 0
3 years ago
X, Y and Z form the vertices of a triangle. XY = 12.4m, XZ = 10.4m and YZ = 8.7m. Find the angle ∠ YXZ rounded to 1 DP.
sweet-ann [11.9K]

Answer:

43.8°

Step-by-step explanation:

Applying,

Cosine rule,

From the diagram attached,

x² = y²+z²-2yxcos∅.................... Equation 1

where ∅ = ∠YXZ

Given: x = 8.7 m, y = 10.4 m, z = 12.4 m

Substitute these values  into equation 1

8.7² = 10.4²+12.4²-[2×10.4×12.4cos∅]

75.69 = (108.16+153.76)-(257.92cos∅)

75.69 = 261.92-257.92cos∅

collect like terms

257.92cos∅ = 261.92-75.69

257.92cos∅ = 186.23

Divide both sides by the coefficient of cos∅

cos∅ = 186.23/257.92

cos∅ = 0.722

Find the cos⁻¹ of both side.

∅ = cos⁻¹(0.7220)

∅ = 43.78°

∅ = 43.8°

6 0
3 years ago
Danielle works Ox hours a day. She earns $5.50 an hour. How much money does Danielle earn each day? Give your answer in terms of
jolli1 [7]

Answer:

5.50x

Step-by-step explanation:

Because you are giving the answer in terms of x, Danielle is earning 5.50 an hour. the X represents the hour, so you multiply 5.50 by x to see how much she earned for that amount of time.

3 0
2 years ago
Read 2 more answers
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